TG: Added Invisty's Emitter sprites.

Cleaned up part of the door code and moved some defines to their proper files.
Firelocks can now be welded open and now shows the welded overlay properly.
Borgs can now properly mess with door wiring. r2895

code/modules/projectiles/guns/energy/laser.dm

@@ -10,6 +10,11 @@
 	origin_tech = "combat=3;magnets=2"
 	projectile_type = "/obj/item/projectile/beam"
 
+/obj/item/weapon/gun/energy/laser/practice
+	name = "practice laser gun"
+	desc = "A modified version of the basic laser gun, this one fires less concentrated energy bolts designed for target practice."
+	projectile_type = "/obj/item/projectile/beam/practice"
+
 
 obj/item/weapon/gun/energy/laser/retro
 	name ="\improper Retro Laser"

code/modules/projectiles/projectile/beams.dm

@@ -47,6 +47,15 @@
 		spawn(0)
 			del(src)
 
+/obj/item/projectile/beam/practice
+	name = "laser"
+	icon_state = "laser"
+	pass_flags = PASSTABLE | PASSGLASS | PASSGRILLE
+	damage = 0
+	damage_type = BURN
+	flag = "laser"
+	eyeblur = 2
+
 /obj/item/projectile/beam/heavylaser
 	name = "\improper Heavy Laser"
 	icon_state = "heavylaser"