Fixes changelings readapting while in stasis removing the regenerate verb. (#18317)

code/game/gamemodes/changeling/changeling_power.dm

@@ -15,6 +15,7 @@
 	var/req_stat = CONSCIOUS // CONSCIOUS, UNCONSCIOUS or DEAD
 	var/genetic_damage = 0 // genetic damage caused by using the sting. Nothing to do with cloneloss.
 	var/max_genetic_damage = 100 // hard counter for spamming abilities. Not used/balanced much yet.
+	var/always_keep = 0 // important for abilities like regenerate that screw you if you lose them.
 
 
 /obj/effect/proc_holder/changeling/proc/on_purchase(mob/user)

code/game/gamemodes/changeling/evolution_menu.dm

@@ -392,7 +392,7 @@ var/list/sting_paths
 			mind.changeling.changeling_speak = 0
 			mind.changeling.reset()
 			for(var/obj/effect/proc_holder/changeling/p in mind.changeling.purchasedpowers)
-				if(p.dna_cost == 0 && keep_free_powers)
+				if((p.dna_cost == 0 && keep_free_powers) || p.always_keep)
 					continue
 				mind.changeling.purchasedpowers -= p
 				p.on_refund(src)

code/game/gamemodes/changeling/powers/revive.dm

@@ -2,6 +2,7 @@
 	name = "Regenerate"
 	desc = "We regenerate, healing all damage from our form."
 	req_stat = DEAD
+	always_keep = 1
 
 //Revive from revival stasis
 /obj/effect/proc_holder/changeling/revive/sting_action(mob/living/carbon/user)