Xenos with USCM Iff tags no longer trigger code red (#7182)

# About the pull request
Stops xenos that have USCM IFF tags from setting code red by being on a
dropship.

# Explain why it's good for the game

My god does it get annoying.


# Changelog
:cl:
add: Xenos with USCM IFF tags no longer trigger code red when on
dropships.
/:cl:

code/modules/shuttle/shuttles/dropship.dm

@@ -115,9 +115,8 @@
 
 	for(var/area/checked_area in shuttle_areas)
 		for(var/mob/living/carbon/xenomorph/checked_xeno in checked_area)
-			if(checked_xeno.stat == DEAD)
+			if(checked_xeno.stat == DEAD || (FACTION_MARINE in checked_xeno?.iff_tag.faction_groups))
 				continue
-
 			var/name = "Unidentified Lifesigns"
 			var/input = "Unidentified lifesigns detected onboard. Recommendation: lockdown of exterior access ports, including ducting and ventilation."
 			shipwide_ai_announcement(input, name, 'sound/AI/unidentified_lifesigns.ogg', ares_logging = ARES_LOG_SECURITY)

code/modules/shuttles/marine_ferry.dm

@@ -218,8 +218,8 @@
 
 	if(!queen_locked)
 		for(var/turf/T in turfs_src)
-			var/mob/living/carbon/xenomorph/X = locate(/mob/living/carbon/xenomorph) in T
-			if(X && X.stat != DEAD)
+			var/mob/living/carbon/xenomorph/xeno = locate(/mob/living/carbon/xenomorph) in T
+			if((xeno && xeno.stat != DEAD) && !(FACTION_MARINE in xeno?.iff_tag.faction_groups))
 				var/name = "Unidentified Lifesigns"
 				var/input = "Unidentified lifesigns detected onboard. Recommendation: lockdown of exterior access ports, including ducting and ventilation."
 				shipwide_ai_announcement(input, name, 'sound/AI/unidentified_lifesigns.ogg', ares_logging = ARES_LOG_SECURITY)