FIRIAMDefaultDisplayImpl: return earlier when bundleURL == nil (#3613) (#3614)

Author: maksymmalyhin

Firebase/InAppMessagingDisplay/FIRIAMDefaultDisplayImpl.m

@@ -63,6 +63,7 @@ + (NSBundle *)getViewResourceBundle {
                     @"FIAM Display Resource bundle "
                      "is missing: not contained within bundle %@",
                     containingBundle);
+      return;
     }
 
     resourceBundle = [NSBundle bundleWithURL:bundleURL];