Merge pull request #554 from thenewtricks/localized-location-key-lookup

Use localized NSLocationWhenInUseUsageDescription key for assert

@@ -3321,7 +3321,7 @@
         //
         if ([CLLocationManager instancesRespondToSelector:@selector(requestWhenInUseAuthorization)])
         {
-            NSAssert([[[NSBundle mainBundle] infoDictionary] valueForKey:@"NSLocationWhenInUseUsageDescription"], @"For iOS 8 and above, your app must have a value for NSLocationWhenInUseUsageDescription in its Info.plist");
+            NSAssert([[NSBundle mainBundle] objectForInfoDictionaryKey:@"NSLocationWhenInUseUsageDescription"], @"For iOS 8 and above, your app must have a value for NSLocationWhenInUseUsageDescription in its Info.plist");
             [_locationManager requestWhenInUseAuthorization];
         }
 #endif