Makes our codebase 1641 ready (#26151)

* Makes our codebase 1641 ready

* Store variable

* Renames var

code/datums/components/_component.dm

@@ -343,17 +343,17 @@
   */
 /datum/proc/GetExactComponent(datum/component/c_type)
 	RETURN_TYPE(c_type)
-	if(initial(c_type.dupe_mode) == COMPONENT_DUPE_ALLOWED || initial(c_type.dupe_mode) == COMPONENT_DUPE_SELECTIVE)
+	var/initial_type_mode = initial(c_type.dupe_mode)
+	if(initial_type_mode == COMPONENT_DUPE_ALLOWED || initial_type_mode == COMPONENT_DUPE_SELECTIVE)
 		stack_trace("GetComponent was called to get a component of which multiple copies could be on an object. This can easily break and should be changed. Type: \[[c_type]\]")
-	var/list/dc = datum_components
-	if(!dc)
+	var/list/all_components = datum_components
+	if(!all_components)
 		return null
-	var/datum/component/C = dc[c_type]
-	if(C)
-		if(length(C))
-			C = C[1]
-		if(C.type == c_type)
-			return C
+	var/datum/component/potential_component
+	if(length(all_components))
+		potential_component = all_components[c_type]
+	if(potential_component?.type == c_type)
+		return potential_component
 	return null
 
 /**

code/datums/datumvars.dm

@@ -463,11 +463,12 @@
 	var/header
 	if(DA)
 		if(islist(DA))
+			var/list/debug_list = DA
 			var/index = name
 			if(value)
-				name = DA[name] // name is really the index until this line
+				name = debug_list[name] // name is really the index until this line
 			else
-				value = DA[name]
+				value = debug_list[name]
 			header = "<li style='backgroundColor:white'>(<a href='byond://?_src_=vars;listedit=\ref[DA];index=[index]'>E</a>) (<a href='byond://?_src_=vars;listchange=\ref[DA];index=[index]'>C</a>) (<a href='byond://?_src_=vars;listremove=\ref[DA];index=[index]'>-</a>) "
 		else
 			header = "<li style='backgroundColor:white'>(<a href='byond://?_src_=vars;datumedit=[DA.UID()];varnameedit=[name]'>E</a>) (<a href='byond://?_src_=vars;datumchange=[DA.UID()];varnamechange=[name]'>C</a>) (<a href='byond://?_src_=vars;datummass=[DA.UID()];varnamemass=[name]'>M</a>) "

code/game/objects/items/weapons/AI_modules.dm

@@ -483,16 +483,16 @@ AI MODULES
 	icon = 'icons/obj/toy.dmi'
 	icon_state = "AI"
 	origin_tech = "programming=6;materials=5;syndicate=6"
-	laws = list("")
+	var/ion_law = ""
 
 /obj/item/aiModule/toyAI/transmitInstructions(mob/living/silicon/ai/target, mob/sender)
 	//..()
 	to_chat(target, "<span class='warning'>KRZZZT</span>")
-	target.add_ion_law(laws[1])
-	return laws[1]
+	target.add_ion_law(ion_law)
+	return ion_law
 
 /obj/item/aiModule/toyAI/attack_self(mob/user)
-	laws[1] = generate_ion_law()
+	ion_law = generate_ion_law()
 	to_chat(user, "<span class='notice'>You press the button on [src].</span>")
-	playsound(user, 'sound/machines/click.ogg', 20, 1)
-	src.loc.visible_message("<span class='warning'>[bicon(src)] [laws[1]]</span>")
+	playsound(user, 'sound/machines/click.ogg', 20, TRUE)
+	visible_message("<span class='warning'>[bicon(src)] [ion_law]</span>")