Ensure you only invite yourself to a Dojo (#296)

Author: Wardormeur

lib/users/is-self.js

@@ -18,6 +18,10 @@ function isSelf (args, cb) {
   if (args.params.data && _.isUndefined(refUserId)) {
     refUserId = args.params.data.childId;
   }
+  // Used by generate-user-invite
+  if (args.params.data && args.params.data.user && _.isUndefined(refUserId)) {
+    refUserId = args.params.data.user.id;
+  }
   var isSelf = false;
   // Could check upon profile, but seems like an overkill to me
   if( userId === refUserId ){