Adds default belly fullscreen to all vore enabled simplemobs

Now all of them have one

code/modules/mob/living/simple_mob/simple_mob_vr.dm

@@ -257,6 +257,7 @@
 		"The churning walls slowly pulverize you into meaty nutrients.",
 		"The stomach glorps and gurgles as it tries to work you into slop.")
 	can_be_drop_pred = TRUE // Mobs will eat anyone that decides to drop/slip into them by default.
+	B.belly_fullscreen = "yet_another_tumby"
 
 /mob/living/simple_mob/Bumped(var/atom/movable/AM, yes)
 	if(tryBumpNom(AM))