Merge pull request #726 from AWDGroup/patch-1

Fixed: attempt to insert nil object from objects[0]

ios/RNFirebase/links/RNFirebaseLinks.m

@@ -6,11 +6,13 @@
 
 
 static void sendDynamicLink(NSURL *url, id sender) {
+    if (url) {
         [[NSNotificationCenter defaultCenter] postNotificationName:LINKS_DYNAMIC_LINK_RECEIVED
                                                             object:sender
                                                           userInfo:@{@"url": url.absoluteString}];
         NSLog(@"sendDynamicLink Success: %@", url.absoluteString);
     }
+}
 
 @implementation RNFirebaseLinks