Only load Reebe during clock cult (#38156)

* Only load clock cult during clock cult

* Return FALSE

code/game/gamemodes/clock_cult/clock_cult.dm

@@ -143,6 +143,12 @@ Credit where due:
 	var/datum/team/clockcult/main_clockcult
 
 /datum/game_mode/clockwork_cult/pre_setup()
+	var/list/errorList = list()
+	SSmapping.LoadGroup(errorList, "Reebe", "map_files/generic", "City_of_Cogs.dmm", default_traits = ZTRAITS_REEBE, silent = TRUE)
+	if(errorList.len)	// reebe failed to load
+		message_admins("Rebee failed to load!")
+		log_game("Rebee failed to load!")
+		return FALSE
 	if(CONFIG_GET(flag/protect_roles_from_antagonist))
 		restricted_jobs += protected_jobs
 	if(CONFIG_GET(flag/protect_assistant_from_antagonist))