h264: change MAX_DELAYED_PIC_COUNT check to av_assert0

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit b955ab2f49)

libavcodec/h264.c

@@ -1403,7 +1403,7 @@ static void decode_postinit(H264Context *h, int setup_finished){
     pics = 0;
     while(h->delayed_pic[pics]) pics++;
 
-    assert(pics <= MAX_DELAYED_PIC_COUNT);
+    av_assert0(pics <= MAX_DELAYED_PIC_COUNT);
 
     h->delayed_pic[pics++] = cur;
     if(cur->reference == 0)