Use MT-safe Clutter.Threads.Timeout.add () instead of GLib.Timeout.add ()

src/Background/SlideShow.vala

@@ -143,7 +143,7 @@ namespace Gala
 			if (interval > uint.MAX)
 				return;
 
-			update_animation_timeout_id = Timeout.add (interval, () => {
+			update_animation_timeout_id = Clutter.Threads.Timeout.add (interval, () => {
 				update_animation_timeout_id = 0;
 				update_animation.begin ();
 				return false;

src/Widgets/WindowOverview.vala

@@ -691,7 +691,7 @@ namespace Gala
 			} else {
 				close (true);
 				//wait for the animation to finish before switching
-				Timeout.add (400, () => {
+				Clutter.Threads.Timeout.add (400, () => {
 					window.get_workspace ().activate_with_focus (window, screen.get_display ().get_current_time ());
 					return false;
 				});
@@ -726,7 +726,7 @@ namespace Gala
 #endif
 			
 			if (animate) {
-				Timeout.add (300, () => {
+				Clutter.Threads.Timeout.add (300, () => {
 					visible = false;
 					ready = true;
 					

src/Widgets/WindowSwitcher.vala

@@ -261,7 +261,7 @@ namespace Gala
 			if (prev_window != current_window) {
 				dim_windows ();
 				// wait for the dimming to finish
-				Timeout.add (250, () => {
+				Clutter.Threads.Timeout.add (250, () => {
 					close (event.time);
 					return false;
 				});

src/Widgets/WindowThumb.vala

@@ -88,7 +88,7 @@ namespace Gala
 			window.delete (window.get_screen ().get_display ().get_current_time ());
 			// see if the window is still alive after the animation ended. If it is, it's pretty certain that it
 			// popped up some kind of confirmation dialog, so we focus it
-			Timeout.add (AnimationSettings.get_default ().close_duration + WAIT_FOR_CONFIRMATION_DIALOG, () => {
+			Clutter.Threads.Timeout.add (AnimationSettings.get_default ().close_duration + WAIT_FOR_CONFIRMATION_DIALOG, () => {
 				if (clone != null && clone.source != null && !(clone.source as Meta.WindowActor).is_destroyed ()) {
 					clone.source.opacity = 255;
 					selected (window);

src/Widgets/WorkspaceThumb.vala

@@ -282,7 +282,7 @@ namespace Gala
 					window.delete (screen.get_display ().get_current_time ());
 			}
 			
-			GLib.Timeout.add (250, () => {
+			Clutter.Threads.Timeout.add (250, () => {
 				//wait for confirmation dialogs to popup
 				if (Utils.get_n_windows (workspace) == 0) {
 					workspace.window_added.disconnect (handle_window_added);
@@ -498,7 +498,7 @@ namespace Gala
 				return;
 			
 			// we need to wait untill the animation ended, otherwise we get trouble with focus handling
-			Timeout.add (AnimationSettings.get_default ().workspace_switch_duration + 10, () => {
+			Clutter.Threads.Timeout.add (AnimationSettings.get_default ().workspace_switch_duration + 10, () => {
 				// check again, maybe something opened
 				if (workspace == null || Utils.get_n_windows (workspace) > 0)
 					return false;
@@ -537,7 +537,7 @@ namespace Gala
 			workspace.activate (screen.get_display ().get_current_time ());
 			
 			// wait for the animation to be finished before closing, for aesthetic reasons
-			Timeout.add (AnimationSettings.get_default ().workspace_switch_duration, () => {
+			Clutter.Threads.Timeout.add (AnimationSettings.get_default ().workspace_switch_duration, () => {
 				clicked ();
 				return false;
 			});
@@ -563,7 +563,7 @@ namespace Gala
 			if (hover_timer > 0)
 				GLib.Source.remove (hover_timer);
 			
-			hover_timer = Timeout.add (CLOSE_BUTTON_DELAY, () => {
+			hover_timer = Clutter.Threads.Timeout.add (CLOSE_BUTTON_DELAY, () => {
 				close_button.visible = true;
 				close_button.animate (AnimationMode.EASE_OUT_ELASTIC, 400, scale_x : 1.0f, scale_y : 1.0f);
 				return false;

src/Widgets/WorkspaceView.vala

@@ -447,7 +447,7 @@ namespace Gala
 #endif
 			
 			animating = true;
-			Timeout.add (50, () => {
+			Clutter.Threads.Timeout.add (50, () => {
 				animating = false;
 				return false;
 			}); //catch hot corner hiding problem

src/Zooming.vala

@@ -67,7 +67,7 @@ namespace Gala
 				wins.scale_center_x = mx;
 				wins.scale_center_y = my;
 				
-				mouse_poll_timer = Timeout.add (MOUSE_POLL_TIME, () => {
+				mouse_poll_timer = Clutter.Threads.Timeout.add (MOUSE_POLL_TIME, () => {
 					client_pointer.get_position (null, out mx, out my);
 					if (wins.scale_center_x == mx && wins.scale_center_y == my)
 						return true;