Changes some 1s and 0s to TRUE and FALSE (#1967)

code/modules/mob/living/carbon/alien/alien_defense.dm

@@ -6,7 +6,7 @@
 	return 2 //no ears
 
 /mob/living/carbon/alien/hitby(atom/movable/AM, skipcatch, hitpush)
-	..(AM, skipcatch = 1, hitpush = 0)
+	..(AM, skipcatch = TRUE, hitpush = FALSE)
 
 
 /*Code for aliens attacking aliens. Because aliens act on a hivemind, I don't see them as very aggressive with each other.

code/modules/mob/living/carbon/alien/humanoid/caste/hunter.dm

@@ -69,11 +69,11 @@
 	if(A)
 		if(isliving(A))
 			var/mob/living/L = A
-			var/blocked = 0
+			var/blocked = FALSE
 			if(ishuman(A))
 				var/mob/living/carbon/human/H = A
 				if(H.check_shields(0, "the [name]", src, attack_type = LEAP_ATTACK))
-					blocked = 1
+					blocked = TRUE
 			if(!blocked)
 				L.visible_message("<span class ='danger'>[src] pounces on [L]!</span>", "<span class ='userdanger'>[src] pounces on you!</span>")
 				L.Knockdown(100)

code/modules/mob/living/carbon/alien/larva/larva.dm

@@ -4,7 +4,7 @@
 	icon_state = "larva0"
 	pass_flags = PASSTABLE | PASSMOB
 	mob_size = MOB_SIZE_SMALL
-	density = 0
+	density = FALSE
 
 	maxHealth = 25
 	health = 25