Fix: Prevent Mech Fabricator output into the wall (#26790)

* Fix: Prevent Mech Fabricator output into the wall

* Move getting turf print on

code/game/mecha/mech_fabricator.dm

@@ -83,6 +83,7 @@
 		"Misc"
 	)
 
+	output_dir = dir
 	return INITIALIZE_HINT_LATELOAD
 
 /obj/machinery/mecha_part_fabricator/LateInitialize()
@@ -213,6 +214,11 @@
 		atom_say("Error: Insufficient power!")
 		return
 
+	var/turf_to_print_on = get_step(src, output_dir)
+	if(iswallturf(turf_to_print_on))
+		atom_say("Error: Output blocked by a wall!")
+		return
+
 	// Subtract the materials from the holder
 	var/list/final_cost = get_design_cost(D)
 	var/datum/component/material_container/materials = GetComponent(/datum/component/material_container)