Guard against empy _inputRef in TextInput

Reviewed By: cpojer

Differential Revision: D4420532

fbshipit-source-id: 6912c11b5a6f5d8efaa07dc7a09a9bc1cda0658a

Libraries/Components/TextInput/TextInput.js

@@ -771,9 +771,11 @@ const TextInput = React.createClass({
   _onChange: function(event: Event) {
     // Make sure to fire the mostRecentEventCount first so it is already set on
     // native when the text value is set.
+    if (this._inputRef) {
       this._inputRef.setNativeProps({
         mostRecentEventCount: event.nativeEvent.eventCount,
       });
+    }
 
     var text = event.nativeEvent.text;
     this.props.onChange && this.props.onChange(event);
@@ -824,7 +826,7 @@ const TextInput = React.createClass({
       nativeProps.selection = this.props.selection;
     }
 
-    if (Object.keys(nativeProps).length > 0) {
+    if (Object.keys(nativeProps).length > 0 && this._inputRef) {
       this._inputRef.setNativeProps(nativeProps);
     }