More minor fixes

canteeneo/api.py

@@ -149,7 +149,7 @@ def get_stall_favorites_count(stall_id):
     stall = Stall.query.get(stall_id)
     if(stall is None):
         return 0
-    return len(stall.favorites)
+    return str(len(stall.favorites))
 
 @app.route('/api/stalls/<int:stall_id>/dishes', methods=['GET'])
 def get_dishes_by_stall(stall_id):
@@ -173,7 +173,7 @@ def stall_favorite(stall_id):
         if stall not in g.user.stall_favorites and favorited:
             g.user.stall_favorites.append(stall)
         elif stall in g.user.stall_favorites and not favorited:
-            g.stall.stall_favorites.remove(stall)
+            g.user.stall_favorites.remove(stall)
         db.session.commit()
     return str(stall in g.user.stall_favorites)