update doc

Originally committed as revision 12960 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/mov.c

@@ -153,7 +153,6 @@ typedef struct MOVContext {
 
 /* those functions parse an atom */
 /* return code:
-  1: found what I wanted, exit
   0: continue to parse next atom
  <0: error occurred, exit
 */