ZSTD_MAGICNUMBER
MEM_writeLE32(dst, ZSTD_MAGICNUMBER);
if (magic == ZSTD_MAGICNUMBER) return 1;
unsigned char hbuf[4]; MEM_writeLE32(hbuf, ZSTD_MAGICNUMBER);
if ( MEM_readLE32(hbuf) != ZSTD_MAGICNUMBER ) {
&& (MEM_readLE32(src) != ZSTD_MAGICNUMBER) ) {