tree: move output scale to global

src/ifs/wl_surface/wp_fractional_scale_v1.rs

@@ -39,7 +39,7 @@ impl WpFractionalScaleV1 {
     pub fn send_preferred_scale(&self) {
         self.client.event(PreferredScale {
             self_id: self.id,
-            scale: self.surface.output.get().preferred_scale.get().0,
+            scale: self.surface.output.get().global.preferred_scale.get().0,
         });
     }