Merge branch 'pr/440'

* pr/440:
  Do not warn on missing render.element if the canvas is already parented (because it was passed in at construction).

src/render/Render.js

@@ -106,7 +106,7 @@ var Mouse = require('../core/Mouse');
 
         if (Common.isElement(render.element)) {
             render.element.appendChild(render.canvas);
-        } else {
+        } else if (!render.canvas.parentNode) {
             Common.log('Render.create: options.element was undefined, render.canvas was created but not appended', 'warn');
         }