changed 'Audio file' to 'Audio only' (to not get 'Audio file file' when played)

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@27365 b3059339-0415-0410-9bf9-f77b7e298cf2

libmpdemux/demux_audio.c

@@ -685,7 +685,7 @@ static int demux_audio_control(demuxer_t *demuxer,int cmd, void *arg){
 const demuxer_desc_t demuxer_desc_audio = {
   "Audio demuxer",
   "audio",
-  "Audio file",
+  "Audio only",
   "?",
   "Audio only files",
   DEMUXER_TYPE_AUDIO,