libutvideodec: Fix typo

Remove extraneous space.
Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/libutvideo.cpp

@@ -100,7 +100,7 @@ static av_cold int utvideo_decode_init(AVCodecContext *avctx)
         return -1;
     }
 
-    /* Allocate the output frame  */
+    /* Allocate the output frame */
     avctx->coded_frame = avcodec_alloc_frame();
 
     /* Ut Video only supports 8-bit */