Fixes some material datum bugs (#47049)

* fixes

* chair

* ass

* fixes

* dumb

* done

* fix

code/game/objects/structures/beds_chairs/chair.dm

@@ -54,8 +54,13 @@
 
 /obj/structure/chair/deconstruct()
 	// If we have materials, and don't have the NOCONSTRUCT flag
-	if(buildstacktype && (!(flags_1 & NODECONSTRUCT_1)))
-		new buildstacktype(loc,buildstackamount)
+	if(!(flags_1 & NODECONSTRUCT_1))
+		if(buildstacktype)
+			new buildstacktype(loc,buildstackamount)
+		else
+			for(var/i in custom_materials)
+				var/datum/material/M = i
+				new M.sheet_type(loc, FLOOR(custom_materials[M] / MINERAL_MATERIAL_AMOUNT, 1))
 	..()
 
 /obj/structure/chair/attack_paw(mob/user)
@@ -126,7 +131,7 @@
 /obj/structure/chair/greyscale
 	material_flags = MATERIAL_ADD_PREFIX | MATERIAL_COLOR
 	item_chair = /obj/item/chair/greyscale
-	
+	buildstacktype = null //Custom mats handle this
 
 /obj/structure/chair/wood
 	icon_state = "wooden_chair"

code/game/objects/structures/table_frames.dm

@@ -45,14 +45,14 @@
 				return
 			to_chat(user, "<span class='notice'>You start adding [material] to [src]...</span>")
 			if(do_after(user, 20, target = src) && material.use(1))
-				var/list/material_list
+				var/list/material_list = list()
 				if(material.material_type)
-					material_list = list(material.material_type = MINERAL_MATERIAL_AMOUNT)
+					material_list[material.material_type] = MINERAL_MATERIAL_AMOUNT
 				make_new_table(/obj/structure/table/greyscale, material_list)
 	else
 		return ..()
 
-/obj/structure/table_frame/proc/make_new_table(table_type, list/custom_materials) //makes sure the new table made retains what we had as a frame
+/obj/structure/table_frame/proc/make_new_table(table_type, custom_materials) //makes sure the new table made retains what we had as a frame
 	var/obj/structure/table/T = new table_type(loc)
 	T.frame = type
 	T.framestack = framestack

code/game/objects/structures/tables_racks.dm

@@ -194,7 +194,12 @@
 /obj/structure/table/deconstruct(disassembled = TRUE, wrench_disassembly = 0)
 	if(!(flags_1 & NODECONSTRUCT_1))
 		var/turf/T = get_turf(src)
-		new buildstack(T, buildstackamount)
+		if(buildstack)
+			new buildstack(T, buildstackamount)
+		else
+			for(var/i in custom_materials)
+				var/datum/material/M = i
+				new M.sheet_type(T, FLOOR(custom_materials[M] / MINERAL_MATERIAL_AMOUNT, 1))
 		if(!wrench_disassembly)
 			new frame(T)
 		else
@@ -204,6 +209,7 @@
 
 /obj/structure/table/greyscale
 	material_flags = MATERIAL_ADD_PREFIX | MATERIAL_COLOR
+	buildstack = null //No buildstack, so generate from mat datums
 
 
 /*