Merge "[nostory] improved adding of class viewContainer"

gz3d/src/gzmultiview.js

@@ -139,7 +139,7 @@ GZ3D.MultiView.prototype.createViewContainer = function(displayParams, name)
         return undefined;
     }
 
-    viewContainer.className += 'viewContainer';
+    viewContainer.className += (viewContainer.className.length > 0) ? ' viewContainer' : 'viewContainer';
 
     // z-index
     var zIndexTop = parseInt(this.mainContainer.style.zIndex, 10) + this.views.length + 1;