Merge pull request #7131 from GinjaNinja32/nullspace

Fixes most nullspace items, rewrites floor tiles not to del() so much

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

@@ -14,7 +14,7 @@
 	var/max_w_class = 3                                 // Hopper intake size.
 	var/max_combined_w_class = 20                       // Total internal storage size.
 	var/obj/item/weapon/tank/tank = null                // Tank of gas for use in firing the cannon.
-	var/obj/item/weapon/storage/tank_container = new()  // Something to hold the tank item so we don't accidentally fire it.
+	var/obj/item/weapon/storage/tank_container  // Something to hold the tank item so we don't accidentally fire it.
 	var/pressure_setting = 10                           // Percentage of the gas in the tank used to fire the projectile.
 	var/possible_pressure_amounts = list(5,10,20,25,50) // Possible pressure settings.
 	var/minimum_tank_pressure = 10                      // Minimum pressure to fire the gun.
@@ -23,6 +23,7 @@
 	                                                    // analyzer with a force_divisor of 10 hit with a damage multiplier of 3000+.
 /obj/item/weapon/gun/launcher/pneumatic/New()
 	..()
+	tank_container = new(src)
 	tank_container.tag = "gas_tank_holder"
 
 /obj/item/weapon/gun/launcher/pneumatic/verb/set_pressure() //set amount of tank pressure.

code/modules/vehicles/cargo_train.dm

@@ -40,8 +40,8 @@
 //-------------------------------------------
 /obj/vehicle/train/cargo/engine/New()
 	..()
-	cell = new /obj/item/weapon/cell/high
-	key = new()
+	cell = new /obj/item/weapon/cell/high(src)
+	key = new(src)
 	var/image/I = new(icon = 'icons/obj/vehicles.dmi', icon_state = "cargo_engine_overlay", layer = src.layer + 0.2) //over mobs
 	overlays += I
 	turn_off()	//so engine verbs are correctly set