邮件优化

src/server/db/SqlStruct.go

@@ -480,6 +480,7 @@ type SqlServerMailStruct struct {
 	Register_time int64  `db:"register_time"`
 	End_time      int64  `db:"end_time"`
 	Mail_type     int    `db:"mail_type"`
+	Send_type     int    `db:"send_type"`
 	To_uids       string `db:"to_uids"`
 	CreateTime    int64  `db:"create_time"`
 }

src/server/game/MailMgr.go

@@ -76,6 +76,7 @@ func (r *MailMgr) LoadMail(msg *msg.Msg) (interface{}, error) {
 			Register_time: v.Register_time,
 			End_time:      v.End_time,
 			Mail_type:     v.Mail_type,
+			Send_type:     v.Send_type,
 			To_uids:       Uids,
 		}
 	}