Add another guard to lazilyLoadView

Summary:
it's possible that moduleForName won't return anything, so we should return.

Created from Diffusion's 'Open in Editor' feature.

Reviewed By: spredolac

Differential Revision: D12963342

fbshipit-source-id: c059595a68bfcaa38221e05fb62d70cc29887ca7

React/Modules/RCTUIManager.m

@@ -1530,6 +1530,10 @@ static void RCTMeasureLayout(RCTShadowView *view,
     // which had RCT Prefixes stripped. Lets check one more time...
     module = [self.bridge moduleForName:RCTDropReactPrefixes(moduleName)];
   }
+
+  if (!module) {
+    return @{};
+  }
 
   RCTComponentData *componentData = [[RCTComponentData alloc] initWithManagerClass:[module class] bridge:self.bridge];
   _componentDataByName[componentData.name] = componentData;