A memory leak occurs when makeswf parse a crafted file with unexpected EOF, and the filename extension is not swf/png/dbl/jpg/jpeg.

## Test Environment
Ubuntu 20.04, 64 bit  
libming (master 04aee52)

## Steps to reproduce
1. compile libming with ASAN
```
$ CC="clang -fsanitize=address,fuzzer-no-link -g" CFLAGS+=" -fcommon" ./configure 
$ make
```
2. Download the poc file from [here](https://raw.githubusercontent.com/Marsman1996/pocs/master/libming/poc-makeswf-04aee52-newBuffer-leak) and run cmd 
`$ makeswf $POC`

## ASAN report
```
$ ./bin_asan/bin/makeswf poc-makeswf-04aee52-newBuffer-leak
Output file name: out.swf
Output compression level: 9
Output SWF version: 6
Preprocessing poc-04aee52-newBuffer-leak... done.
Parser error: writing empty block

Compiling `out.swf.frame0.pp'... failed:
  Line 1: Reason: 'Unexpected EOF found while looking for input.'


=================================================================
==1424921==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 40 byte(s) in 1 object(s) allocated from:
    #0 0x4c567f in malloc /home/ubuntu178/Downloads/llvm12/projects/compiler-rt/lib/asan/asan_malloc_linux.cpp:145:3
    #1 0x576e0c in newBuffer /home/ubuntu178/cvelibf/test/libming/04aee52/build_asan/src/actioncompiler/../../../code/src/actioncompiler/compile.c:143:23
    #2 0x5baf76 in swf5parse /home/ubuntu178/cvelibf/test/libming/04aee52/build_asan/src/actioncompiler/../../../code/src/actioncompiler/swf5compiler.y:1319:40
    #3 0x511a7d in SWFAction_compile /home/ubuntu178/cvelibf/test/libming/04aee52/build_asan/src/blocks/../../../code/src/blocks/action.c:138:17
    #4 0x5007da in makeswf_compile_source /home/ubuntu178/cvelibf/test/libming/04aee52/build_asan/util/../../code/util/makeswf_utils.c:132:6
    #5 0x4fde3a in main /home/ubuntu178/cvelibf/test/libming/04aee52/build_asan/util/../../code/util/makeswf.c:412:9
    #6 0x7f5a547920b2 in __libc_start_main /build/glibc-eX1tMB/glibc-2.31/csu/../csu/libc-start.c:308:16

Indirect leak of 128 byte(s) in 1 object(s) allocated from:
    #0 0x4c567f in malloc /home/ubuntu178/Downloads/llvm12/projects/compiler-rt/lib/asan/asan_malloc_linux.cpp:145:3
    #1 0x576e65 in newBuffer /home/ubuntu178/cvelibf/test/libming/04aee52/build_asan/src/actioncompiler/../../../code/src/actioncompiler/compile.c:148:23
    #2 0x5baf76 in swf5parse /home/ubuntu178/cvelibf/test/libming/04aee52/build_asan/src/actioncompiler/../../../code/src/actioncompiler/swf5compiler.y:1319:40
    #3 0x511a7d in SWFAction_compile /home/ubuntu178/cvelibf/test/libming/04aee52/build_asan/src/blocks/../../../code/src/blocks/action.c:138:17
    #4 0x5007da in makeswf_compile_source /home/ubuntu178/cvelibf/test/libming/04aee52/build_asan/util/../../code/util/makeswf_utils.c:132:6
    #5 0x4fde3a in main /home/ubuntu178/cvelibf/test/libming/04aee52/build_asan/util/../../code/util/makeswf.c:412:9
    #6 0x7f5a547920b2 in __libc_start_main /build/glibc-eX1tMB/glibc-2.31/csu/../csu/libc-start.c:308:16

SUMMARY: AddressSanitizer: 168 byte(s) leaked in 2 allocation(s).
```
Memory leak in newBuffer() at compile.c:143/148
This is a GitHub Issue
repo:libming
owner:libming
Title : Memory leak in newBuffer() at compile.c:143/148
Issue date:

--- start body ---
A memory leak occurs when makeswf parse a crafted file with unexpected EOF, and the filename extension is not swf/png/dbl/jpg/jpeg.

## Test Environment
Ubuntu 20.04, 64 bit  
libming (master 04aee52)

## Steps to reproduce
1. compile libming with ASAN
```
$ CC="clang -fsanitize=address,fuzzer-no-link -g" CFLAGS+=" -fcommon" ./configure 
$ make
```
2. Download the poc file from [here](https://raw.githubusercontent.com/Marsman1996/pocs/master/libming/poc-makeswf-04aee52-newBuffer-leak) and run cmd 
`$ makeswf $POC`

## ASAN report
```
$ ./bin_asan/bin/makeswf poc-makeswf-04aee52-newBuffer-leak
Output file name: out.swf
Output compression level: 9
Output SWF version: 6
Preprocessing poc-04aee52-newBuffer-leak... done.
Parser error: writing empty block

Compiling `out.swf.frame0.pp'... failed:
  Line 1: Reason: 'Unexpected EOF found while looking for input.'


=================================================================
==1424921==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 40 byte(s) in 1 object(s) allocated from:
    #0 0x4c567f in malloc /home/ubuntu178/Downloads/llvm12/projects/compiler-rt/lib/asan/asan_malloc_linux.cpp:145:3
    #1 0x576e0c in newBuffer /home/ubuntu178/cvelibf/test/libming/04aee52/build_asan/src/actioncompiler/../../../code/src/actioncompiler/compile.c:143:23
    #2 0x5baf76 in swf5parse /home/ubuntu178/cvelibf/test/libming/04aee52/build_asan/src/actioncompiler/../../../code/src/actioncompiler/swf5compiler.y:1319:40
    #3 0x511a7d in SWFAction_compile /home/ubuntu178/cvelibf/test/libming/04aee52/build_asan/src/blocks/../../../code/src/blocks/action.c:138:17
    #4 0x5007da in makeswf_compile_source /home/ubuntu178/cvelibf/test/libming/04aee52/build_asan/util/../../code/util/makeswf_utils.c:132:6
    #5 0x4fde3a in main /home/ubuntu178/cvelibf/test/libming/04aee52/build_asan/util/../../code/util/makeswf.c:412:9
    #6 0x7f5a547920b2 in __libc_start_main /build/glibc-eX1tMB/glibc-2.31/csu/../csu/libc-start.c:308:16

Indirect leak of 128 byte(s) in 1 object(s) allocated from:
    #0 0x4c567f in malloc /home/ubuntu178/Downloads/llvm12/projects/compiler-rt/lib/asan/asan_malloc_linux.cpp:145:3
    #1 0x576e65 in newBuffer /home/ubuntu178/cvelibf/test/libming/04aee52/build_asan/src/actioncompiler/../../../code/src/actioncompiler/compile.c:148:23
    #2 0x5baf76 in swf5parse /home/ubuntu178/cvelibf/test/libming/04aee52/build_asan/src/actioncompiler/../../../code/src/actioncompiler/swf5compiler.y:1319:40
    #3 0x511a7d in SWFAction_compile /home/ubuntu178/cvelibf/test/libming/04aee52/build_asan/src/blocks/../../../code/src/blocks/action.c:138:17
    #4 0x5007da in makeswf_compile_source /home/ubuntu178/cvelibf/test/libming/04aee52/build_asan/util/../../code/util/makeswf_utils.c:132:6
    #5 0x4fde3a in main /home/ubuntu178/cvelibf/test/libming/04aee52/build_asan/util/../../code/util/makeswf.c:412:9
    #6 0x7f5a547920b2 in __libc_start_main /build/glibc-eX1tMB/glibc-2.31/csu/../csu/libc-start.c:308:16

SUMMARY: AddressSanitizer: 168 byte(s) leaked in 2 allocation(s).
```
--- end body ---

A memory leak vulnerability in the newBuffer function of libming occurs when the makeswf tool processes a crafted file with an unexpected EOF. This can lead to resource exhaustion over time if exploited repeatedly, as memory allocated during the parsing is not properly freed.