Merge pull request phaserjs#1151 from videlais/patch-4

CocoonJS doesn't support mouse wheel

Author: photonstorm

src/input/Mouse.js

@@ -222,13 +222,13 @@ Phaser.Mouse.prototype = {
         this.game.canvas.addEventListener('mousedown', this._onMouseDown, true);
         this.game.canvas.addEventListener('mousemove', this._onMouseMove, true);
         this.game.canvas.addEventListener('mouseup', this._onMouseUp, true);
-        this.game.canvas.addEventListener('mousewheel', this._onMouseWheel, true);
-        this.game.canvas.addEventListener('DOMMouseScroll', this._onMouseWheel, true);
 
         if (!this.game.device.cocoonJS)
         {
             this.game.canvas.addEventListener('mouseover', this._onMouseOver, true);
             this.game.canvas.addEventListener('mouseout', this._onMouseOut, true);
+            this.game.canvas.addEventListener('mousewheel', this._onMouseWheel, true);
+            this.game.canvas.addEventListener('DOMMouseScroll', this._onMouseWheel, true);
         }
 
     },