[gnome-shell] overviewControls: Correct the use of x2 in SlidingControl

[Jasper St. Pierre <jstpierre src gnome org>]

commit 40cd92f701847e805a3d8fbcd1558e2e7802ec80
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Wed Sep 18 19:42:41 2013 -0400

    overviewControls: Correct the use of x2 in SlidingControl
    
    The x2 here needs to be more than just the width; it needs to
    be added onto the x1.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=694881

 js/ui/overviewControls.js |    9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)
---
diff --git a/js/ui/overviewControls.js b/js/ui/overviewControls.js
index c16c4ac..4128d6c 100644
--- a/js/ui/overviewControls.js
+++ b/js/ui/overviewControls.js
@@ -63,10 +63,11 @@ const SlideLayout = new Lang.Class({
         let translationX = (realDirection == SlideDirection.LEFT) ?
             (availWidth - natWidth) : (natWidth - availWidth);
 
-        let actorBox = new Clutter.ActorBox({ x1: translationX,
-                                              y1: 0,
-                                              x2: child.x_expand ? availWidth : natWidth,
-                                              y2: child.y_expand ? availHeight : natHeight });
+        let actorBox = new Clutter.ActorBox();
+        actorBox.x1 = translationX;
+        actorBox.x2 = actorBox.x1 + child.x_expand ? availWidth : natWidth;
+        actorBox.y1 = 0;
+        actorBox.y2 = actorBox.y1 + child.y_expand ? availHeight : natHeight;
 
         child.allocate(actorBox, flags);
     },