Fix ffplay -an/-vn options that were swapped by r26105.

Originally committed as revision 26115 to svn://svn.ffmpeg.org/ffmpeg/trunk

ffplay.c

@@ -2466,16 +2466,17 @@ static int decode_thread(void *arg)
 
     for (i = 0; i < ic->nb_streams; i++)
         ic->streams[i]->discard = AVDISCARD_ALL;
-    if (!audio_disable)
+    if (!video_disable)
         st_index[AVMEDIA_TYPE_VIDEO] =
             av_find_best_stream(ic, AVMEDIA_TYPE_VIDEO,
                                 wanted_stream[AVMEDIA_TYPE_VIDEO], -1, NULL, 0);
-    if (!video_disable) {
+    if (!audio_disable)
         st_index[AVMEDIA_TYPE_AUDIO] =
             av_find_best_stream(ic, AVMEDIA_TYPE_AUDIO,
                                 wanted_stream[AVMEDIA_TYPE_AUDIO],
                                 st_index[AVMEDIA_TYPE_VIDEO],
                                 NULL, 0);
+    if (!video_disable)
         st_index[AVMEDIA_TYPE_SUBTITLE] =
             av_find_best_stream(ic, AVMEDIA_TYPE_SUBTITLE,
                                 wanted_stream[AVMEDIA_TYPE_SUBTITLE],
@@ -2483,7 +2484,6 @@ static int decode_thread(void *arg)
                                  st_index[AVMEDIA_TYPE_AUDIO] :
                                  st_index[AVMEDIA_TYPE_VIDEO]),
                                 NULL, 0);
-    }
     if (show_status) {
         dump_format(ic, 0, is->filename, 0);
     }