ffplay: do not init SDL audio if -an is specified.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

ffplay.c

@@ -3032,6 +3032,8 @@ int main(int argc, char **argv)
         video_disable = 1;
     }
     flags = SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER;
+    if (audio_disable)
+        flags &= ~SDL_INIT_AUDIO;
 #if !defined(__MINGW32__) && !defined(__APPLE__)
     flags |= SDL_INIT_EVENTTHREAD; /* Not supported on Windows or Mac OS X */
 #endif