rem: io_buffer = (char *)malloc(IO_BUFFER_SIZE+4);
add: io_buffer = (char *)malloc(IO_BUFFER_SIZE);
context: void io_start_buffering(int fd){	if (io_buffer) return;	multiplex_out_fd = fd;	io_buffer = (char *)malloc(IO_BUFFER_SIZE+4);	if (!io_buffer) out_of_memory("writefd");	io_buffer_count = 0;	/* leave room for the multiplex header in case it's needed */	io_buffer += 4;}