end property wasnt being used in Firebase endAt function

firebase-element.html

@@ -229,7 +229,7 @@ <h3>My Firebase Data</h3>
           query = query.startAt(this.start);
         }
         if (this.end) {
-          query = query.endAt(this.start);
+          query = query.endAt(this.end);
         }
         if (this.limit > 0) {
           query = query.limit(this.limit);