Fixes invalid use of nano module host var. (#8858)

code/modules/modular_computers/file_system/programs/_program.dm

@@ -7,6 +7,9 @@
 /obj/item/modular_computer/update_layout()
 	return TRUE
 
+/datum/computer_file/program/update_layout()
+	return TRUE
+
 /datum/nano_module/program
 	available_to_ai = FALSE
 	var/datum/computer_file/program/program	// Program-Based computer program that runs this nano module. Defaults to null.

code/modules/modular_computers/file_system/programs/civilian/cargo_control.dm

@@ -109,7 +109,7 @@
 
 /datum/nano_module/program/civilian/cargocontrol/Topic(href, href_list)
 	var/datum/shuttle/autodock/ferry/supply/shuttle = SScargo.shuttle
-	var/obj/item/modular_computer/console = host
+	var/obj/item/modular_computer/console = program.computer
 	if (!shuttle)
 		log_debug("## ERROR: Eek. The supply/shuttle datum is missing somehow.")
 		return

code/modules/modular_computers/file_system/programs/civilian/crusher_control.dm

@@ -61,11 +61,11 @@
 
 	if(href_list["initialize"])
 		pistons = list()
-		for(var/obj/machinery/crusher_base/pstn in orange(10, src.host))
+		for(var/obj/machinery/crusher_base/pstn in orange(10, src.ui_host()))
 			pistons += pstn
 
 		airlocks = list()
-		for(var/obj/machinery/door/airlock/arlk in orange(10, src.host))
+		for(var/obj/machinery/door/airlock/arlk in orange(10, src.ui_host()))
 			if(arlk.id_tag != "crusher")
 				continue
 			airlocks += arlk