[fixed] Warning caused by trying to focus null element

closes #11

Author: mzabriskie

Diff for: lib/components/ModalPortal.js

@@ -36,8 +36,8 @@ var ModalPortal = module.exports = React.createClass({
     // Focus needs to be set when mounting and already open
     if (this.props.isOpen) {
       this.setFocusAfterRender(true);
+      this.open();
     }
-    this.handleProps(this.props);
   },
 
   componentWillReceiveProps: function(newProps) {
@@ -46,7 +46,10 @@ var ModalPortal = module.exports = React.createClass({
       this.setFocusAfterRender(true);
     }
 
-    this.handleProps(newProps);
+    if (newProps.isOpen === true)
+      this.open();
+    else if (newProps.isOpen === false)
+      this.close();
   },
 
   componentDidUpdate: function () {
@@ -60,13 +63,6 @@ var ModalPortal = module.exports = React.createClass({
     this.focusAfterRender = focus;
   },
 
-  handleProps: function(props) {
-    if (props.isOpen === true)
-      this.open();
-    else if (props.isOpen === false)
-      this.close();
-  },
-
   open: function() {
     focusManager.setupScopedFocus(this.getDOMNode());
     focusManager.markForFocusLater();