grabHelper: Make sure to return not null when the stack contains fake grabs

We did this if there's nothing in the grab stack, but didn't do this
when there's no real grabs in the grab stack.

diff --git a/js/ui/grabHelper.js b/js/ui/grabHelper.js
index 4a72351bbd53824a776fd2222b356c42a2aaf945..ac65351280fbf9e8e9f407f170490a7b721641a1 100644 (file)
--- a/js/ui/grabHelper.js
+++ b/js/ui/grabHelper.js
@@ -84,14 +84,11 @@ const GrabHelper = new Lang.Class({
     },
 
     get currentGrab() {
-        if (!this._grabStack.length)
-            return {};
-
         let idx = this._grabStack.length - 1;
         while (idx >= 0 && this._grabStack[idx].untracked)
             idx--;
 
-        return this._grabStack[idx];
+        return this._grabStack[idx] || {};
     },
 
     _findStackIndex: function(actor) {