mlp_parser: use av_assert

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/mlp_parser.c

@@ -129,7 +129,7 @@ int ff_mlp_read_major_sync(void *log, MLPHeaderInfo *mh, GetBitContext *gb)
     int ratebits;
     uint16_t checksum;
 
-    assert(get_bits_count(gb) == 0);
+    av_assert1(get_bits_count(gb) == 0);
 
     if (gb->size_in_bits < 28 << 3) {
         av_log(log, AV_LOG_ERROR, "packet too short, unable to read major sync\n");