[s] Lowers xenomorph acid damage on living mobs (#22291)

* What does acid taste like?

* Contra Review

* Contra Review

* Contra Review

* Update code/modules/mob/living/carbon/human/human_defense.dm

Co-authored-by: Contrabang <91113370+Contrabang@users.noreply.github.com>

---------

Co-authored-by: Contrabang <91113370+Contrabang@users.noreply.github.com>

code/datums/spells/alien_spells/corrosive_acid_spit.dm

@@ -20,7 +20,10 @@
 	if(!plasma_check(200, user))
 		to_chat(user, "<span class='noticealien'>You don't have enough plasma to perform this action!</span>")
 		return
-	if(target.acid_act(200, 100))
+	var/acid_damage_modifier = 100
+	if(isliving(target))
+		acid_damage_modifier = 50
+	if(target.acid_act(2 * acid_damage_modifier, acid_damage_modifier))
 		visible_message("<span class='alertalien'>[user] vomits globs of vile stuff all over [target]. It begins to sizzle and melt under the bubbling mess of acid!</span>")
 		add_attack_logs(user, target, "Applied corrosive acid") // Want this logged
 		user.add_plasma(-200)

code/game/objects/obj_defense.dm

@@ -166,14 +166,13 @@ GLOBAL_DATUM_INIT(acid_overlay, /mutable_appearance, mutable_appearance('icons/e
 ///the obj's reaction when touched by acid
 /obj/acid_act(acidpwr, acid_volume)
 	if(!(resistance_flags & UNACIDABLE) && acid_volume)
-
 		if(!acid_level)
 			SSacid.processing[src] = src
 			add_overlay(GLOB.acid_overlay, TRUE)
 		var/acid_cap = acidpwr * 300 //so we cannot use huge amounts of weak acids to do as well as strong acids.
 		if(acid_level < acid_cap)
 			acid_level = min(acid_level + acidpwr * acid_volume, acid_cap)
-		return 1
+		return TRUE
 
 ///the proc called by the acid subsystem to process the acid that's on the obj
 /obj/proc/acid_processing()