Fixes a very old exploit

code/game/atoms_movable.dm

@@ -570,21 +570,22 @@
 //movement_dir == 0 when stopping or any dir when trying to move
 /atom/movable/proc/Process_Spacemove(movement_dir = 0)
 	if(has_gravity(src))
-		return 1
+		return TRUE
 
 	if(pulledby)
-		return 1
+		pulledby.stop_pulling()
+		return TRUE
 
 	if(throwing)
-		return 1
+		return TRUE
 
 	if(!isturf(loc))
-		return 1
+		return TRUE
 
 	if(locate(/obj/structure/lattice) in range(1, get_turf(src))) //Not realistic but makes pushing things in space easier
-		return 1
+		return TRUE
 
-	return 0
+	return FALSE
 
 
 /atom/movable/proc/newtonian_move(direction) //Only moves the object if it's under no gravity