Revert "[fixed] Dont change body class if isOpen not change (#201)"

This reverts commit 1e29e4f.

Author: claydiffrient

Diff for: lib/components/Modal.js

@@ -67,16 +67,14 @@ var Modal = React.createClass({
   },
 
   renderPortal: function(props) {
-    if (this.props.isOpen !== props.isOpen) {
-      if (props.isOpen) {
-        elementClass(document.body).add('ReactModal__Body--open');
-      } else {
-        elementClass(document.body).remove('ReactModal__Body--open');
-      }
+    if (props.isOpen) {
+      elementClass(document.body).add('ReactModal__Body--open');
+    } else {
+      elementClass(document.body).remove('ReactModal__Body--open');
+    }
 
-      if (props.ariaHideApp) {
-        ariaAppHider.toggle(props.isOpen, props.appElement);
-      }
+    if (props.ariaHideApp) {
+      ariaAppHider.toggle(props.isOpen, props.appElement);
     }
 
     this.portal = renderSubtreeIntoContainer(this, ModalPortal(Assign({}, props, {defaultStyles: Modal.defaultStyles})), this.node);