Add disk numbers 1 through 4 (currently roman numerals)

pharaoh.gd

@@ -26,7 +26,7 @@ func _on_interacted() -> void:
 	print("Loaded up disk ", wanted_disk)
 
 	wanted_disk = disks_wanted.front()
-	if not wanted_disk:
+	if %Player2D.has_disk(wanted_disk):
 		return
 
 	%Player2D.give_objective("disk%d" % wanted_disk, "Locate data disk %d" % wanted_disk)