macosx: Make sure VLCIntf gets NULL-ify when VLC ends.

modules/gui/macosx/intf.m

@@ -737,6 +737,8 @@ static VLCMain *_o_sharedMainInstance = nil;
 
     vlc_object_kill( p_intf->p_libvlc );
 
+    [self setIntf:nil];
+
     /* Go back to Run() and make libvlc exit properly */
     if( jmpbuffer )
         longjmp( jmpbuffer, 1 );

modules/gui/macosx/vout.m

@@ -444,7 +444,7 @@ int DeviceCallback( vlc_object_t *p_this, const char *psz_variable,
 - (void)manage
 {
     /* Disable Screensaver, when we're playing something, but allow it on pause */
-    if( !VLCIntf || !VLCIntf->p_sys || !VLCIntf->p_sys->i_play_status )
+    if( !VLCIntf || !VLCIntf->p_sys )
         return;
 
     if( VLCIntf->p_sys->i_play_status == PLAYING_S )