BackgroundBlurEffect: fix blur with multimonitor configurations on mutter49

Author: garaevdi

src/BackgroundBlurEffect.vala

@@ -171,8 +171,7 @@ public class Gala.BackgroundBlurEffect : Clutter.Effect {
             box_scale_factor = stage_view.get_scale ();
             last_box_scale_factor = box_scale_factor;
 
-#if HAS_MUTTER49
-            stage_view.get_layout (stage_view_layout);
+            stage_view.get_layout (ref stage_view_layout);
 
             origin_x -= stage_view_layout.x;
             origin_y -= stage_view_layout.y;

vapi/mutter-clutter.vapi

@@ -7474,11 +7474,7 @@ namespace Clutter {
 #endif
 		public virtual Clutter.PaintFlag get_default_paint_flags ();
 		public unowned Cogl.Framebuffer get_framebuffer ();
-#if HAS_MUTTER49
-		public void get_layout (Mtk.Rectangle rect);
-#else
 		public void get_layout (ref Mtk.Rectangle rect);
-#endif
 #if HAS_MUTTER47
 		public void get_offscreen_transformation_matrix (Graphene.Matrix matrix);
 #else