[jsondata] correctly parse argument on server side

vispa/controller/ajax.py

@@ -84,6 +84,7 @@ class AjaxController(AbstractController):
     def setjson(self, key, value, wid=None):
         db = cherrypy.request.db
         user_id = self.get("user_id")
+        wid = int(wid) if wid else None
         JSONData.set_value(db,
             user_id      =user_id,
             key          =key,
@@ -96,7 +97,7 @@ class AjaxController(AbstractController):
     def getjson(self, key, wid=None):
         db = cherrypy.request.db
         user_id = self.get("user_id")
-        wid = int(wid)
+        wid = int(wid) if wid else None
         return JSON.dumps(JSONData.get_value(db,
             user_id      =user_id,
             key          =key,