dctx.outblk = realloc(dctx.outblk, dctx.outsize);
dctx.outblk = srealloc(dctx.outblk, dctx.outsize);
static void zlib_emit_char(int c) {    dctx.window[dctx.winpos] = c;    dctx.winpos = (dctx.winpos + 1) & (WINSIZE-1);    if (dctx.outlen >= dctx.outsize) {	dctx.outsize = dctx.outlen + 512;	dctx.outblk = realloc(dctx.outblk, dctx.outsize);    }    dctx.outblk[dctx.outlen++] = c;}