propTypes could be undefined

Summary:
public
This causes a warning since propType not exist

Reviewed By: vjeux

Differential Revision: D2713358

fb-gh-sync-id: 58406d1dc969e6f1d40bee958c28cc87036b30c2

Libraries/Animated/src/AnimatedImplementation.js

@@ -1094,6 +1094,10 @@ function createAnimatedComponent(Component: any): any {
   }
   AnimatedComponent.propTypes = {
     style: function(props, propName, componentName) {
+      if (!Component.propTypes) {
+        return;
+      }
+
       for (var key in ViewStylePropTypes) {
         if (!Component.propTypes[key] && props[key] !== undefined) {
           console.error(