h261dec: use av_assert

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

libavcodec/h261dec.c

@@ -25,6 +25,7 @@
  * H.261 decoder.
  */
 
+#include "libavutil/avassert.h"
 #include "dsputil.h"
 #include "avcodec.h"
 #include "mpegvideo.h"
@@ -629,8 +630,8 @@ retry:
     }
     ff_MPV_frame_end(s);
 
-assert(s->current_picture.f.pict_type == s->current_picture_ptr->f.pict_type);
-assert(s->current_picture.f.pict_type == s->pict_type);
+    av_assert0(s->current_picture.f.pict_type == s->current_picture_ptr->f.pict_type);
+    av_assert0(s->current_picture.f.pict_type == s->pict_type);
 
     *pict = s->current_picture_ptr->f;
     ff_print_debug_info(s, pict);