Adds a unit test to check for any missing initial icon states (#8332)

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

@@ -3,7 +3,7 @@
 	name = "alien"
 	desc = "What IS that?"
 	icon = 'icons/mob/npc/alien.dmi'
-	icon_state = "alien"
+	icon_state = "alien_s"
 	pass_flags = PASSTABLE
 	health = 100
 	maxHealth = 100

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

@@ -7,7 +7,7 @@
 	var/alert = null
 	use_me = 0 //Can't use the me verb, it's a freaking immobile brain
 	icon = 'icons/obj/surgery.dmi'
-	icon_state = "brain1"
+	icon_state = "brain"
 
 /mob/living/carbon/brain/Destroy()
 	if(key)				//If there is a mob connected to this thing. Have to check key twice to avoid false death reporting.

code/modules/mob/living/silicon/robot/robot_modules.dm

@@ -14,7 +14,7 @@ var/global/list/robot_modules = list(
 /obj/item/robot_module
 	name = "robot module"
 	icon = 'icons/obj/module.dmi'
-	icon_state = "std_module"
+	icon_state = "std_mod"
 	w_class = 100.0
 	item_state = "electronic"
 	flags = CONDUCT

code/modules/mob/living/simple_animal/friendly/farm_animals.dm

@@ -168,9 +168,9 @@
 	name = "\improper chicken"
 	desc = "Hopefully the eggs are good this season."
 	icon = 'icons/mob/npc/livestock.dmi'
-	icon_state = "chicken"
-	icon_living = "chicken"
-	icon_dead = "chicken_dead"
+	icon_state = null
+	icon_living = null
+	icon_dead = null
 	speak = list("Cluck!","BWAAAAARK BWAK BWAK BWAK!","Bwaak bwak.")
 	speak_emote = list("clucks","croons")
 	emote_hear = list("clucks")

code/modules/mob/living/simple_animal/hostile/retaliate/clown.dm

@@ -1,6 +1,7 @@
 /mob/living/simple_animal/hostile/retaliate/clown
 	name = "clown"
 	desc = "A denizen of clown planet"
+	icon = 'icons/mob/npc/human.dmi'
 	icon_state = "clown"
 	icon_living = "clown"
 	icon_dead = "clown_dead"

code/modules/mob/living/simple_animal/hostile/sarlacc.dm

@@ -12,7 +12,7 @@
 	name = "great worm maw"
 	desc = "Hop in, the gastrointestinal juices are just fine."
 	icon = 'icons/mob/npc/cavern.dmi'
-	icon_state = "blank"
+	icon_state = null
 	mouse_opacity = 0
 	throwforce = 0
 	anchored = 1

code/modules/mob/living/simple_animal/worm.dm

@@ -2,9 +2,9 @@
 	name = "space worm segment"
 	desc = "A part of a space worm."
 	icon = 'icons/mob/npc/animal.dmi'
-	icon_state = "spaceworm"
-	icon_living = "spaceworm"
-	icon_dead = "spacewormdead"
+	icon_state = null
+	icon_living = null
+	icon_dead = null
 	status_flags = 0
 
 	speak_emote = list("transmits") //not supposed to be used under AI control
@@ -48,9 +48,9 @@
 
 	head
 		name = "space worm head"
-		icon_state = "spacewormhead"
-		icon_living = "spacewormhead"
-		icon_dead = "spacewormdead"
+		icon_state = "spacewormhead0"
+		icon_living = "spacewormhead0"
+		icon_dead = "spacewormheaddead"
 
 		maxHealth = 20
 		health = 20
@@ -123,7 +123,7 @@
 			eatingDuration = 0
 
 	update_icon() //only for the sake of consistency with the other update icon procs
-		if(stat == CONSCIOUS || stat == UNCONSCIOUS)
+		if(stat != DEAD)
 			if(previous) //midsection
 				icon_state = "spaceworm[get_dir(src,previous) | get_dir(src,next)]" //see 3 lines below
 			else //tail