doc: fix a couple of typos in frame.h

diff --git a/libavutil/frame.h b/libavutil/frame.h
index 30cc1e47c994ca0828582e230a50be1d4ea48501..6b168e2cb924a5ee1f94c85a4c38bec2e299715b 100644 (file)
--- a/libavutil/frame.h
+++ b/libavutil/frame.h
@@ -428,7 +428,7 @@ AVFrame *av_frame_alloc(void);
 void av_frame_free(AVFrame **frame);
 
 /**
- * Setup a new reference to the data described by an given frame.
+ * Set up a new reference to the data described by the source frame.
  *
  * Copy frame properties from src to dst and create a new reference for each
  * AVBufferRef from src.