Merge commit '7751e4693dd10ec98c20fbd9887233b575034272'

* commit '7751e4693dd10ec98c20fbd9887233b575034272':
  ogg: check that the expected number of headers had been parsed
  libx264: change default to closed gop to match x264cli
  Use avcodec_free_frame() to free AVFrames.
  lavf: use a malloced AVFrame in try_decode_frame().
  lavc: add avcodec_free_frame().
  lavc: ensure extended_data is set properly on decoding
  lavc: initialize AVFrame.extended_data in avcodec_get_frame_defaults()
  lavc: use av_mallocz to allocate AVFrames.
  lavc: rename the argument of avcodec_alloc_frame/get_frame_defaults

Conflicts:
	doc/APIchanges
	doc/examples/decoding_encoding.c
	libavcodec/utils.c
	libavcodec/version.h
	libavfilter/src_movie.c
	libavformat/oggdec.c
	libavformat/oggdec.h
	libavformat/oggparsetheora.c
	libavformat/utils.c

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

ffplay.c

@@ -1795,7 +1795,7 @@ static int video_thread(void *arg)
     avfilter_graph_free(&graph);
 #endif
     av_free_packet(&pkt);
-    av_free(frame);
+    avcodec_free_frame(&frame);
     return 0;
 }
 
@@ -2296,7 +2296,7 @@ static void stream_component_close(VideoState *is, int stream_index)
         swr_free(&is->swr_ctx);
         av_freep(&is->audio_buf1);
         is->audio_buf = NULL;
-        av_freep(&is->frame);
+        avcodec_free_frame(&is->frame);
 
         if (is->rdft) {
             av_rdft_end(is->rdft);