更新openId选项

go/gopath/src/fohow.com/apps/controllers/permit_controller/permit_controller.go

@@ -136,6 +136,10 @@ func (self *PermitController) XcxLogin() {
 		if len(wxUser.Head) > 0 {
 			wxUser.FullHead = self.GetFullImgUrl(wxUser.Head)
 		}
+		if wxUser.Openid != key.Openid {
+			wxUser.Openid = key.Openid
+			wxUser.UpdateField("Openid")
+		}
 	} else {
 		//注册会员
 		ip := self.Ctx.Input.IP()