Merge pull request #470 from Kienz/visiblePropFix

Bugfix fabric.PathGroup if object is not visible

src/object.class.js

@@ -628,7 +628,7 @@
      */
     render: function(ctx, noTransform) {
 
-      // do not render if width or height are zeros
+      // do not render if width/height are zeros or object is not visible
       if (this.width === 0 || this.height === 0 || !this.visible) return;
 
       ctx.save();

src/path_group.class.js

@@ -65,6 +65,10 @@
      * @param {CanvasRenderingContext2D} ctx Context to render this instance on
      */
     render: function(ctx) {
+
+      // do not render if object is not visible
+      if (!this.visible) return;
+
       ctx.save();
 
       var m = this.transformMatrix;