Add compability code for xpanes fuel recipes

init.lua

@@ -1055,9 +1055,15 @@ xpanes.register_pane("paper", {
 	}
 })
 
+local r
+if minetest.registered_items["xpanes:paper_flat"] then
+	r = "xpanes:paper_flat"
+else
+	r = "xpanes:paper"
+end
 minetest.register_craft({
 	type = "fuel",
-	recipe = "xpanes:paper",
+	recipe = r,
 	burntime = 1,
 })
 
@@ -1076,9 +1082,14 @@ xpanes.register_pane("wood", {
 	}
 })
 
+if minetest.registered_items["xpanes:wood_flat"] then
+	r = "xpanes:wood_flat"
+else
+	r = "xpanes:wood"
+end
 minetest.register_craft({
 	type = "fuel",
-	recipe = "xpanes:wood",
+	recipe = r,
 	burntime = 2,
 })
 
@@ -1139,9 +1150,14 @@ xpanes.register_pane("papyrus", {
 	}
 })
 
+if minetest.registered_items["xpanes:papyrus_flat"] then
+	r = "xpanes:papyrus_flat"
+else
+	r = "xpanes:papyrus"
+end
 minetest.register_craft({
 	type = "fuel",
-	recipe = "xpanes:papyrus",
+	recipe = r,
 	burntime = 1,
 })