[FFmpeg-cvslog] avfilter: Document avfilter_graph_alloc return value

[Federico Tomassetti]

ffmpeg | branch: master | Federico Tomassetti <federico at tomassetti.me> | Sat Mar 21 10:44:57 2015 +0000| [cfe64613923a2d47644a87386146ada1f9f6b659] | committer: Luca Barbato

avfilter: Document avfilter_graph_alloc return value

Signed-off-by: Luca Barbato <lu_zero at gentoo.org>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=cfe64613923a2d47644a87386146ada1f9f6b659
---

 libavfilter/avfilter.h |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavfilter/avfilter.h b/libavfilter/avfilter.h
index 1b42086..5c41630 100644
--- a/libavfilter/avfilter.h
+++ b/libavfilter/avfilter.h
@@ -1004,6 +1004,8 @@ typedef struct AVFilterGraph {
 
 /**
  * Allocate a filter graph.
+ *
+ * @return the allocated filter graph on success or NULL.
  */
 AVFilterGraph *avfilter_graph_alloc(void);