macosx: select right screen when fullscreen on startup is enabled

close #7051
(cherry picked from commit b71b4312976d6ee7b067c8dbfeb59dab83da5505)
Signed-off-by: David Fuhrmann <david.fuhrmann@googlemail.com>

modules/gui/macosx/MainWindow.m

@@ -1741,13 +1741,10 @@ static VLCMainWindow *_o_sharedInstance = nil;
     NSScreen *screen;
     NSRect screen_rect;
     NSRect rect;
-    vout_thread_t *p_vout = getVout();
     BOOL blackout_other_displays = config_GetInt( VLCIntf, "macosx-black" );
     id o_videoWindow = b_nonembedded ? o_detached_video_window : self;
 
-    if( p_vout )
-        screen = [NSScreen screenWithDisplayID:(CGDirectDisplayID)config_GetInt( VLCIntf, "macosx-vdev" )];
-
+    screen = [NSScreen screenWithDisplayID:(CGDirectDisplayID)config_GetInt( VLCIntf, "macosx-vdev" )];
     [self lockFullscreenAnimation];
 
     if (!screen)
@@ -1761,9 +1758,6 @@ static VLCMainWindow *_o_sharedInstance = nil;
         screen = [NSScreen deepestScreen];
     }
 
-    if( p_vout )
-        vlc_object_release( p_vout );
-
     screen_rect = [screen frame];
 
     [o_fullscreen_btn setState: YES];