Document AVCodecContext channels field.

patch by Stefano Sabatini, stefano.sabatini-lala poste it


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@13115 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavcodec/avcodec.h

@@ -921,7 +921,7 @@ typedef struct AVCodecContext {
 
     /* audio only */
     int sample_rate; ///< samples per second
-    int channels;
+    int channels;    ///< number of audio channels
 
     /**
      * audio sample format