Deduplicate formspec code

compatibility.lua

@@ -33,12 +33,6 @@ for _,mod in ipairs(requiredMclModules) do
 	end
 end
 
-if industrialtest.mtgAvailable then
-	industrialtest.stackMax=99
-elseif industrialtest.mclAvailable then
-	industrialtest.stackMax=64
-end
-
 industrialtest.mods={}
 if industrialtest.mtgAvailable then
 	industrialtest.mods._3dArmor=minetest.get_modpath("3d_armor")
@@ -53,10 +47,11 @@ if industrialtest.mtgAvailable and not industrialtest.mods._3dArmor then
 end
 
 industrialtest.elementKeys={}
-
 industrialtest.internal={}
 
 if industrialtest.mclAvailable then
+	industrialtest.stackMax=64
+
 	industrialtest.internal.mclMakeStrippedTrunk=function(itemstack,placer,pointedThing,electricTool)
 		-- Taken from https://git.minetest.land/MineClone2/MineClone2/src/branch/master/mods/ITEMS/mcl_tools/init.lua#L360
 		if pointedThing.type ~= "node" then return end
@@ -85,9 +80,22 @@ if industrialtest.mclAvailable then
 		end
 		return itemstack
 	end
+
 	industrialtest.internal.explode=function(pos,radius,dropChance)
 		mcl_explosions.explode(pos,radius,{drop_chance=dropChance})
 	end
+
+	industrialtest.internal.getItemSlotBg=mcl_formspec.get_itemslot_bg
+elseif industrialtest.mtgAvailable then
+	industrialtest.stackMax=99
+
+	industrialtest.internal.explode=function(pos,radius)
+		tnt.boom(pos,{radius=radius})
+	end
+
+	industrialtest.internal.getItemSlotBg=function()
+		return ""
+	end
 end
 
 -- compatibilty that adds not existing elements
@@ -611,10 +619,6 @@ if industrialtest.mclAvailable then
 		y_min=mcl_vars.mg_overworld_min
 	})
 elseif industrialtest.mtgAvailable then
-	industrialtest.internal.explode=function(pos,radius)
-		tnt.boom(pos,{radius=radius})
-	end
-
 	industrialtest.internal.registerMetal=function(name,displayName,hardness)
 		minetest.register_craftitem("industrialtest:"..name.."_lump",{
 			description=S(displayName.." Lump"),