Fix vehicles being able to drive in space

Unfortunately, it COMPLETELY stops vehicles from moving in space,
including via jetpack and other such things. Sorry, wizard car. :(

code/modules/vehicle/train/train.dm

@@ -36,6 +36,15 @@
 			unattach()
 		return 0
 
+/obj/vehicle/train/can_move()
+	if(!is_train_head())
+		return 1 //towed objects do not need power to Move()
+
+	if(!..())
+		return 0
+	return 1
+
+
 /obj/vehicle/train/Bump(atom/Obstacle)
 	if(!istype(Obstacle, /atom/movable))
 		return

code/modules/vehicle/train/trains/ambulance.dm

@@ -44,21 +44,10 @@
 	key = new()
 
 /obj/vehicle/train/ambulance/engine/Move()
-	if(on && cell.charge < charge_use)
-		turn_off()
-		update_stats()
-		if(load && is_train_head())
-			load << "The drive motor briefly whines, then drones to a stop."
-
-	if(is_train_head() && !on)
-		return 0
-
 	. = ..()
-
 	handle_rotation()
 	update_mob()
 
-
 /obj/vehicle/train/ambulance/trolley/attackby(obj/item/weapon/W as obj, mob/user as mob, params)
 	if(open && istype(W, /obj/item/weapon/wirecutters))
 		passenger_allowed = !passenger_allowed
@@ -177,7 +166,7 @@
 		return 0
 
 	if(is_train_head())
-		if(direction == reverse_direction(dir))
+		if(direction == reverse_direction(dir) && tow) //can reverse with no tow
 			return 0
 		if(Move(get_step(src, direction)))
 			return 1

code/modules/vehicle/train/trains/cargo/cargo_train.dm

@@ -47,18 +47,6 @@
 	overlays += I
 	turn_off()	//so engine verbs are correctly set
 
-/obj/vehicle/train/cargo/engine/Move()
-	if(on && cell.charge < charge_use)
-		turn_off()
-		update_stats()
-		if(load && is_train_head())
-			load << "The drive motor briefly whines, then drones to a stop."
-
-	if(is_train_head() && !on)
-		return 0
-
-	return ..()
-
 /obj/vehicle/train/cargo/trolley/attackby(obj/item/weapon/W as obj, mob/user as mob, params)
 	if(open && istype(W, /obj/item/weapon/wirecutters))
 		passenger_allowed = !passenger_allowed

code/modules/vehicle/train/trains/janicart.dm

@@ -51,20 +51,10 @@
 	R.my_atom = src
 
 /obj/vehicle/train/janitor/engine/Move()
-	if(on && cell.charge < charge_use)
-		turn_off()
-		update_stats()
-		if(load && is_train_head())
-			load << "The drive motor briefly whines, then drones to a stop."
-
-	if(is_train_head() && !on)
-		return 0
-
+	. = ..()
 	handle_rotation()
 	update_mob()
 
-	return ..()
-
 /obj/vehicle/train/janitor/trolley/attackby(obj/item/weapon/W as obj, mob/user as mob, params)
 	if(openTop)
 		W.loc = src

code/modules/vehicle/vehicle.dm

@@ -42,10 +42,7 @@
 	//spawn the cell you want in each vehicle
 
 /obj/vehicle/Move()
-	if(world.time > l_move_time + move_delay)
-		if(on && powered && cell.charge < charge_use)
-			turn_off()
-
+	if(can_move())
 		var/init_anc = anchored
 		anchored = 0
 		if(!..())
@@ -65,6 +62,23 @@
 	else
 		return 0
 
+/obj/vehicle/proc/can_move()
+	if(world.time <= l_move_time + move_delay)
+		return 0
+
+	if(!on || !powered)
+		return 0
+
+	if(on && powered && cell.charge < charge_use)
+		turn_off()
+		return 0
+
+	if(istype(loc, /turf/space))
+		return 0
+
+	return 1
+
+
 /obj/vehicle/attackby(obj/item/weapon/W as obj, mob/user as mob, params)
 	if(istype(W, /obj/item/weapon/hand_labeler))
 		return
@@ -224,19 +238,19 @@
 
 /obj/vehicle/proc/powercheck()
 	if(!cell && !powered)
-		return
+		return 0
 
 	if(!cell && powered)
 		turn_off()
-		return
+		return 0
 
 	if(cell.charge < charge_use)
 		turn_off()
-		return
+		return 0
 
 	if(cell && powered)
 		turn_on()
-		return
+		return 1
 
 /obj/vehicle/proc/insert_cell(var/obj/item/weapon/stock_parts/cell/C, var/mob/living/carbon/human/H)
 	if(cell)