fix wx_user inner_no

go/gopath/src/fohow.com/apps/models/user_model/wx_user.go

@@ -175,7 +175,8 @@ func GetByOpenid(openid string, useCache bool) *WxUser {
 }
 
 func GetWxUserById(id int64, useCache bool) *WxUser {
-	k := cache.GetKey(cache.GetWxUserById, id)
+	k := fmt.Sprintf("GetWxUserById(%d)", id)
+
 	if useCache {
 		if usr, ok := cache.Cache.Get(k).(*WxUser); ok {
 			return usr