fix(fight): 登录直接断开，战斗复制错误

logic/controller/login.go

@@ -38,6 +38,7 @@ func (h *Controller) Login(data *user.MAIN_LOGIN_IN, c gnet.Conn) (result *user.
 	tt := data.CheakSession()
 	if !tt {
 		err = errorcode.ErrorCodes.ErrLoginServerError
+		defer c.Close()
 		return
 	}
 

logic/service/fight/fightc.go

@@ -343,6 +343,9 @@ func IsNil(x interface{}) bool {
 	return rv.Kind() == reflect.Ptr && rv.IsNil()
 }
 func (f *FightC) copyskill(t *action.SelectSkillAction) *info.SkillEntity {
+	if t == nil {
+		return nil
+	}
 	if t.SkillEntity == nil {
 		return nil