Add warning if people try using an unimplemented aout function (zorglub!!!)....

Add warning if people try using an unimplemented aout function (zorglub!!!). This is currently only possible through the qt interface (i haven't tried it myself).

src/audio_output/dec.c

@@ -140,9 +140,7 @@ static aout_input_t * DecNew( vlc_object_t * p_this, aout_instance_t * p_aout,
     aout_InputNew( p_aout, p_input );
 
     vlc_mutex_unlock( &p_aout->mixer_lock );
-    var_Create( p_this, "audio-desync", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
-    var_Get( p_this, "audio-desync", &val );
-    p_input->i_desync = val.i_int * 1000;
+    p_input->i_desync = var_CreateGet( p_this, "audio-desync" ) * 1000;
 
     p_input_thread = (input_thread_t *)vlc_object_find( p_this,
                                            VLC_OBJECT_INPUT, FIND_PARENT );

src/audio_output/intf.c

@@ -544,5 +544,7 @@ void aout_EnableFilter( vlc_object_t *p_this, const char *psz_name,
 char *aout_VisualChange( vlc_object_t *p_this, int i_skip )
 {
     (void)p_this; (void)i_skip;
+    msg_Err( p_this, "FIXME: %s (%s %d) isn't implemented.", __func__,
+             __FILE__, __LINE__ );
     return strdup("foobar");
 }