Fixes some cases where fakedeath doesn't work. (#16404)

Co-authored-by: Matt Atlas <liermattia@gmail.com>

code/modules/organs/blood.dm

@@ -119,7 +119,7 @@
 
 /mob/living/carbon/human/proc/get_blood_oxygenation()
 	var/blood_volume = get_blood_circulation()
-	if(is_asystole()) // Heart is missing or isn't beating and we're not breathing (hardcrit)
+	if(is_asystole() || (status_flags & FAKEDEATH)) // Heart is missing or isn't beating and we're not breathing (hardcrit)
 		return min(blood_volume, BLOOD_VOLUME_SURVIVE)
 
 	if(!need_breathe())

code/modules/organs/internal/lungs.dm

@@ -340,6 +340,9 @@
 	if(owner.failed_last_breath)
 		return "no respiration"
 
+	if(owner.status_flags & FAKEDEATH)
+		return "no respiration"
+
 	if(BP_IS_ROBOTIC(src))
 		if(is_bruised())
 			return "malfunctioning fans"