Fixes flatgun drop code (#61453)

About The Pull Request

Changes the drop code handling from being in pickup (requiring some shitcode to work) to instead handle the same code in equip. This behaviour is nonsense, but it at least now works as intended.

fixes #61281
Why It's Good For The Game

Shit ruin with bad loot and bullshit like this
Changelog

cl
fix: Stickmen flatguns now properly drop out of your hands when picked up, as intended.
/cl

code/modules/projectiles/guns/ballistic/pistol.dm

@@ -90,9 +90,9 @@
 	mag_display = FALSE
 	show_bolt_icon = FALSE
 
-/obj/item/gun/ballistic/automatic/pistol/stickman/pickup(mob/living/user)
-	SHOULD_CALL_PARENT(FALSE)
-	to_chat(user, span_notice("As you try to pick up [src], it slips out of your grip.."))
+/obj/item/gun/ballistic/automatic/pistol/stickman/equipped(mob/user, slot)
+	..()
+	to_chat(user, span_notice("As you try to manipulate [src], it slips out of your possession.."))
 	if(prob(50))
 		to_chat(user, span_notice("..and vanishes from your vision! Where the hell did it go?"))
 		qdel(src)
@@ -100,4 +100,3 @@
 	else
 		to_chat(user, span_notice("..and falls into view. Whew, that was a close one."))
 		user.dropItemToGround(src)
-