Fixes low-yield EMP grenades

code/game/objects/items/weapons/grenades/emgrenade.dm

@@ -3,10 +3,12 @@
 	icon_state = "emp"
 	item_state = "empgrenade"
 	origin_tech = list(TECH_MATERIAL = 2, TECH_MAGNET = 3)
+	var/emp_heavy = 4
+	var/emp_light = 10
 
 	prime()
 		..()
-		if(empulse(src, 4, 10))
+		if(empulse(src, emp_heavy, emp_light))
 			qdel(src)
 		return
 
@@ -15,9 +17,5 @@
 	desc = "A weaker variant of the EMP grenade"
 	icon_state = "lyemp"
 	origin_tech = list(TECH_MATERIAL = 2, TECH_MAGNET = 3)
-
-	prime()
-		..()
-		if(empulse(src, 4, 1))
-			qdel(src)
-		return
+	emp_heavy = 1
+	emp_light = 4