Fix some new dreamchecker lints (#91844)

## About The Pull Request

https://github.com/SpaceManiac/SpacemanDMM/pull/435 added a new
dreamchecker lint, for SDMM `set` statements not at the top of the proc.

While this lint isn't in the current SDMM _release_, I was testing it
out earlier and saw these issues, so might as well fix them before they
even become an issue.

i also fixed a useless variable in moon heretic code that was right next
to the incorrectly placed `SIGNAL_HANDLER`

## Why It's Good For The Game

https://github.com/user-attachments/assets/5b063f41-32f3-490a-b0a3-199ca8147ec3

## Changelog

No player-facing changes.

(cherry picked from commit a2a43e2851)

code/modules/modular_computers/file_system/program_circuit.dm

@@ -53,8 +53,8 @@
 	return ..()
 
 /obj/item/circuit_component/mod_program/populate_ports()
-	. = ..()
 	SHOULD_CALL_PARENT(TRUE)
+	. = ..()
 	start = add_input_port("Start", PORT_TYPE_SIGNAL, trigger = PROC_REF(start_prog))
 	kill = add_input_port("Kill", PORT_TYPE_SIGNAL, trigger = PROC_REF(kill_prog))
 	running = add_output_port("Running", PORT_TYPE_NUMBER)