Fix segfault due to deallocated entries in delayed_pic after size change.

Fixes issue714.


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@15965 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavcodec/h264.c

@@ -3639,6 +3639,7 @@ static int decode_slice_header(H264Context *h, H264Context *h0){
         if(h != h0)
             return -1;   // width / height changed during parallelized decoding
         free_tables(h);
+        flush_dpb(s->avctx);
         MPV_common_end(s);
     }
     if (!s->context_initialized) {