fix login qq error

@@ -33,23 +33,17 @@ function doPassportCallback(req, res, user) {
         refer = config.siteUrl;
     }
     if (user.openId) {
-        let signinByOpenID;
-
         user.nickname = _.trim(user.nickname);
 
         if (user.sourceType === 'wechat') {
-
-            // PC 的微信登录之前使用了 open_id, 所以需要特别的接口处理
-            signinByOpenID = AuthHelper.signinByWechat(
-                user.nickname, user.openId, user.unionId, user.sourceType, shoppingKey);
-        } else {
-            signinByOpenID = AuthHelper.signinByOpenID(
-                user.nickname, user.openId, user.sourceType, shoppingKey);
+            // PC 的微信登录使用unionId
+            user.openId = user.unionId;
         }
 
-        return signinByOpenID.then((result) => {
+        return AuthHelper.signinByOpenID(user.nickname, user.openId, user.sourceType, shoppingKey)
+            .then((result) => {
                 if (result.code !== 200) {
-                return Promise.reject(result);
+                    return res.redirect(config.siteUrl);
                 }
                 if (result.data['is_bind'] && result.data['is_bind'] === 'N') { //eslint-disable-line
                     return helpers.urlFormat('/passport/thirdlogin/index', {
@@ -62,7 +56,8 @@ function doPassportCallback(req, res, user) {
                         return refer;
                     });
                 }
-        }).then((redirectTo) => {
+            })
+            .then((redirectTo) => {
                 return res.redirect(redirectTo);
             });
     } else {