Furranium fixes.

code/modules/mob/living/carbon/human/human.dm

@@ -811,6 +811,8 @@
 	for(var/datum/mutation/human/HM in dna.mutations)
 		if(HM.quality != POSITIVE)
 			dna.remove_mutation(HM.name)
+	if(blood_volume < (BLOOD_VOLUME_NORMAL*blood_ratio))
+		blood_volume = (BLOOD_VOLUME_NORMAL*blood_ratio)
 	..()
 
 /mob/living/carbon/human/check_weakness(obj/item/weapon, mob/living/attacker)