OSX: set volume on playlist

modules/gui/macosx/controls.m

@@ -420,10 +420,13 @@
 - (IBAction)volumeSliderUpdated:(id)sender
 {
     intf_thread_t * p_intf = VLCIntf;
+    playlist_t * p_playlist = pl_Hold( p_intf );
     audio_volume_t i_volume = (audio_volume_t)[sender intValue];
-    int i_volume_step = 0;
+    int i_volume_step;
+
     i_volume_step = config_GetInt( p_intf->p_libvlc, "volume-step" );
-    aout_VolumeSet( p_intf, i_volume * i_volume_step );
+    aout_VolumeSet( p_playlist, i_volume * i_volume_step );
+    pl_Release( p_playlist );
     /* Manage volume status */
     [o_main manageVolumeSlider];
 }

modules/gui/macosx/intf.m

@@ -1612,7 +1612,10 @@ static void manage_cleanup( void * args )
 - (void)manageVolumeSlider
 {
     audio_volume_t i_volume;
-    aout_VolumeGet( p_intf, &i_volume );
+    playlist_t * p_playlist = pl_Hold( p_intf );
+
+    aout_VolumeGet( p_playlist, &i_volume );
+    pl_Release( p_intf );
 
     if( i_volume != i_lastShownVolume )
     {