Fix compilation warnings (#2132)

Author: lenemter

src/ShellClients/HideTracker.vala

@@ -99,7 +99,7 @@ public class Gala.HideTracker : Object {
         display.get_stage ().add_action_full ("panel-swipe-gesture", CAPTURE, pan_action);
     }
 
-    //Can be removed with mutter > 45
+#if !HAS_MUTTER45
     private bool window_has_pointer () {
         var cursor_tracker = display.get_cursor_tracker ();
         Graphene.Point pointer_pos;
@@ -118,6 +118,7 @@ public class Gala.HideTracker : Object {
         };
         return graphene_window_rect.contains_point (pointer_pos);
     }
+#endif
 
     private void track_focus_window (Meta.Window? window) {
         if (window == null) {

src/WindowManager.vala

@@ -1300,6 +1300,8 @@ namespace Gala {
                 case Meta.SizeChange.UNFULLSCREEN:
                     handle_fullscreen_window (window, which_change_local);
                     break;
+                default:
+                    break;
             }
 
             size_change_completed (actor);