Follow up to 9f4587a

Fixes #1877
Thanks to @Tokeiburu and @Everade for their help.

src/map/clif.c

@@ -1829,6 +1829,7 @@ static int clif_delayquit(int tid, unsigned int tick, int id, intptr_t data)
  *------------------------------------------*/
 void clif_quitsave(int fd,struct map_session_data *sd) {
 	if (!battle_config.prevent_logout ||
+		sd->canlog_tick == 0 ||
 		DIFF_TICK(gettick(), sd->canlog_tick) > battle_config.prevent_logout)
 		map_quit(sd);
 	else if (sd->fd) {
@@ -10637,7 +10638,7 @@ void clif_parse_QuitGame(int fd, struct map_session_data *sd)
 	/*	Rovert's prevent logout option fixed [Valaris]	*/
 	//int type = RFIFOW(fd,packet_db[sd->packet_ver][RFIFOW(fd,0)].pos[0]);
 	if( !sd->sc.data[SC_CLOAKING] && !sd->sc.data[SC_HIDING] && !sd->sc.data[SC_CHASEWALK] && !sd->sc.data[SC_CLOAKINGEXCEED] && !sd->sc.data[SC_SUHIDE] &&
-		(!battle_config.prevent_logout || DIFF_TICK(gettick(), sd->canlog_tick) > battle_config.prevent_logout) )
+		(!battle_config.prevent_logout || sd->canlog_tick == 0 || DIFF_TICK(gettick(), sd->canlog_tick) > battle_config.prevent_logout) )
 	{
 		set_eof(fd);
 		pc_damage_log_clear(sd,0);
@@ -10984,7 +10985,7 @@ void clif_parse_Restart(int fd, struct map_session_data *sd)
 	case 0x01:
 		/*	Rovert's Prevent logout option - Fixed [Valaris]	*/
 		if( !sd->sc.data[SC_CLOAKING] && !sd->sc.data[SC_HIDING] && !sd->sc.data[SC_CHASEWALK] && !sd->sc.data[SC_CLOAKINGEXCEED] && !sd->sc.data[SC_SUHIDE] &&
-			(!battle_config.prevent_logout || DIFF_TICK(gettick(), sd->canlog_tick) > battle_config.prevent_logout) )
+			(!battle_config.prevent_logout || sd->canlog_tick == 0 || DIFF_TICK(gettick(), sd->canlog_tick) > battle_config.prevent_logout) )
 		{	//Send to char-server for character selection.
 			pc_damage_log_clear(sd,0);
 			chrif_charselectreq(sd, session[fd]->client_addr);