Fixed a typo, cosmetics.

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@7598 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavcodec/zmbvenc.c

@@ -300,7 +300,7 @@ static int encode_init(AVCodecContext *avctx)
 
 
 /**
- * Uninit zmbv decoder
+ * Uninit zmbv encoder
  */
 static int encode_end(AVCodecContext *avctx)
 {