Remove check for _wrapperState.pendingUpdate.

We can just set it to true regardless.

src/renderers/dom/client/wrappers/ReactDOMSelect.js

@@ -236,7 +236,7 @@ function _handleChange(event) {
   var props = this._currentElement.props;
   var returnValue = LinkedValueUtils.executeOnChange(props, event);
 
-  if (this._rootNodeID && !this._wrapperState.pendingUpdate) {
+  if (this._rootNodeID) {
     this._wrapperState.pendingUpdate = true;
   }
   ReactUpdates.asap(updateOptionsIfPendingUpdateAndMounted, this);