优化签到插件，qqwife插件添加礼物系统 (#480)

plugin/score/model.go

@@ -107,7 +107,7 @@ func (sdb *scoredb) InsertOrUpdateSignInCountByUID(uid int64, count int) (err er
 	if err = db.Model(&signintable{}).First(&si, "uid = ? ", uid).Error; err != nil {
 		// error handling...
 		if gorm.IsRecordNotFoundError(err) {
-			db.Model(&signintable{}).Create(&si) // newUser not user
+			err = db.Model(&signintable{}).Create(&si).Error // newUser not user
 		}
 	} else {
 		err = db.Model(&signintable{}).Where("uid = ? ", uid).Update(