macosx: fix behaviour when changing video splitters on the fly

modules/gui/macosx/MainWindow.m

@@ -530,7 +530,8 @@ static VLCMainWindow *_o_sharedInstance = nil;
 {
     id obj = [notification object];
 
-    if ([obj class] == [VLCVideoWindowCommon class] || [obj class] == [VLCDetachedVideoWindow class] || ([obj class] == [VLCMainWindow class] && !b_nonembedded)) {
+    // hasActiveVideo is defined for VLCVideoWindowCommon and subclasses
+    if ([obj respondsToSelector:@selector(hasActiveVideo)] && [obj hasActiveVideo]) {
         if ([[VLCMain sharedInstance] activeVideoPlayback])
             [[VLCCoreInteraction sharedInstance] stop];
     }

modules/gui/macosx/VLCVoutWindowController.m

@@ -202,11 +202,13 @@
         [o_window leaveFullscreen];
 
     [[o_window videoView] releaseVoutThread];
-    [o_window setHasActiveVideo: NO];
 
+    // set active video to no BEFORE closing the window to avoid stopping playback
+    // due to NSWindowWillCloseNotification
+    [o_window setHasActiveVideo: NO];
     if (![NSStringFromClass([o_window class]) isEqualToString:@"VLCMainWindow"]) {
         [o_window close];
-        [o_window orderOut:self];
+        [o_window orderOut:self]; // for dark interface
     }
 
     [o_vout_dict removeObjectForKey:o_key];