avformat/mov: Increment stsd_count while processing stsd data; avoids leaks.

In the event of ff_mov_read_stsd_entries() failure, sc->stsd_count
is not updated, even if the function allocates extradata memory.
Instead update the sc->stsd_count as entries are parsed so that
mov_read_close() can do the right thing.
Signed-off-by: Dale Curtis <dalecurtis@chromium.org>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavformat/mov.c

@@ -2464,8 +2464,10 @@ int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries)
         }
 
         if (mov_skip_multiple_stsd(c, pb, st->codecpar->codec_tag, format,
-                                   size - (avio_tell(pb) - start_pos)))
+                                   size - (avio_tell(pb) - start_pos))) {
+            sc->stsd_count++;
             continue;
+        }
 
         sc->pseudo_stream_id = st->codecpar->codec_tag ? -1 : pseudo_stream_id;
         sc->dref_id= dref_id;
@@ -2517,6 +2519,7 @@ int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries)
             av_freep(&st->codecpar->extradata);
             st->codecpar->extradata_size = 0;
         }
+        sc->stsd_count++;
     }
 
     if (pb->eof_reached)
@@ -2566,8 +2569,6 @@ static int mov_read_stsd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
     if (ret < 0)
         goto fail;
 
-    sc->stsd_count = entries;
-
     /* Restore back the primary extradata. */
     av_freep(&st->codecpar->extradata);
     st->codecpar->extradata_size = sc->extradata_size[0];