Small fixes for foam force weapons

-Adds a new icon for the toy tommy gun with a blue muzzle, so it doesn't
have to use the real tommy gun's icon or what is was using, nothing.
-fixes the rounding on the toy smg so it now doesn't have an invisable
magazine when loaded and displays the correct amount of ammo.

code/modules/projectiles/ammunition/magazines.dm

@@ -378,7 +378,7 @@
 
 /obj/item/ammo_box/magazine/toy/smg/update_icon()
 	..()
-	icon_state = "smg9mm-[round(ammo_count(),5)]"
+	icon_state = "smg9mm-[round(ammo_count()+1,4)*6/4]"
 
 /obj/item/ammo_box/magazine/toy/smg/riot
 	ammo_type = /obj/item/ammo_casing/caseless/foam_dart/riot

code/modules/projectiles/guns/projectile/toy.dm

@@ -92,8 +92,8 @@
 /obj/item/weapon/gun/projectile/shotgun/toy/tommygun
 	name = "tommy gun"
 	desc = "Looks almost like the real thing! Great for practicing Drive-bys. Ages 8 and up."
-	icon = 'icons/obj/guns/projectile.dmi'
-	icon_state = "tommy"
+	icon = 'icons/obj/guns/toy.dmi'
+	icon_state = "tommygun"
 	item_state = "shotgun"
 	mag_type = /obj/item/ammo_box/magazine/internal/shot/toy/tommygun
 	w_class = 2