Virology fixes & mutation disabling

1) Viruses no longer mutate in mobs.
2) Fixed a runtime error with IS_SYNTHETIC check in activate()
3) Antibody Analyzer has a green sprite, to make it easier to
distinguish from the Health Analyzer

code/modules/virus2/disease2.dm

@@ -58,15 +58,18 @@
 		return
 
 	var/mob/living/carbon/human/MS = mob
-	if(MS && (MS.species.flags & IS_SYNTHETIC))
-		return
+	if(istype(MS))
+		if(MS.species.flags & IS_SYNTHETIC)
+			return
 
 	if(stage <= 1 && clicks == 0) 	// with a certain chance, the mob may become immune to the disease before it starts properly
 		if(prob(5))
 			mob.antibodies |= antigen
-	if(mob.radiation > 50)
-		if(prob(1))
-			majormutateinactivate(mob)
+
+//	NO MORE MUTATING IN MOBS - Bone White
+//	if(mob.radiation > 50)
+//		if(prob(1))
+//			majormutateinactivate(mob)
 
 	//Space antibiotics stop disease completely
 	if(mob.reagents.has_reagent("spaceacillin"))

code/modules/virus2/items_devices.dm

@@ -3,7 +3,7 @@
 /obj/item/device/antibody_scanner
 	name = "\improper Antibody Scanner"
 	desc = "Scans living beings for antibodies in their blood."
-	icon_state = "health"
+	icon_state = "antibody"
 	w_class = 2.0
 	item_state = "electronic"
 	flags = FPRINT | TABLEPASS | CONDUCT