fix: withType has different behavior in 1.21.3+ and refuses to replace air. GG minecraft.

Author: oddlama

vane-core/src/main/java/org/oddlama/vane/util/ItemUtil.java

@@ -101,7 +101,11 @@ public static ItemStack set_lore(final ItemStack item, final List<Component> lor
     }
 
     public static ItemStack name_item(final ItemStack item, Component name, final List<Component> lore) {
-        final var meta = item.getItemMeta();
+        var meta = item.getItemMeta();
+		if (meta == null) {
+			// Cannot name item without meta (probably air)
+			return item;
+		}
 
         name = name.decoration(TextDecoration.ITALIC, false);
         meta.displayName(name);

vane-portals/src/main/java/org/oddlama/vane/portals/menu/StyleMenu.java

@@ -539,7 +539,7 @@ private MenuWidget menu_item_block_selector(
             public void item(final ItemStack item) {
                 var stack = item_for_type(style_container, active, type);
                 if (stack.getType() == Material.AIR) {
-                    stack = stack.withType(Material.BARRIER);
+                    stack = new ItemStack(Material.BARRIER);
                 }
                 super.item(t_item.alternative(stack, "§6" + building_material.getKey()));
             }