Fix smelting vanilla xp boost. Fixes #3270

src/main/java/com/gmail/nossr50/listeners/InventoryListener.java

@@ -124,10 +124,8 @@ public class InventoryListener implements Listener {
     @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
     public void onFurnaceExtractEvent(FurnaceExtractEvent event) {
         Block furnaceBlock = event.getBlock();
-        BlockState furnaceState = furnaceBlock.getState();
-        ItemStack result = furnaceState instanceof Furnace ? ((Furnace) furnaceState).getInventory().getResult() : null;
 
-        if (!ItemUtils.isSmelted(result)) {
+        if (!ItemUtils.isSmelted(new ItemStack(event.getItemType(), event.getItemAmount()))) {
             return;
         }
 
@@ -137,7 +135,8 @@ public class InventoryListener implements Listener {
             return;
         }
 
-        event.setExpToDrop(UserManager.getPlayer(player).getSmeltingManager().vanillaXPBoost(event.getExpToDrop()));
+        int exp = UserManager.getPlayer(player).getSmeltingManager().vanillaXPBoost(event.getExpToDrop());
+        event.setExpToDrop(exp);
     }
 
     @EventHandler(priority = EventPriority.NORMAL, ignoreCancelled = true)

src/main/java/com/gmail/nossr50/util/ItemUtils.java

@@ -524,8 +524,8 @@ public final class ItemUtils {
         }
 
         for (Recipe recipe : mcMMO.p.getServer().getRecipesFor(item)) {
-            if (recipe instanceof FurnaceRecipe) {
-                return MaterialUtils.isOre(((FurnaceRecipe) recipe).getInput().getData());
+            if (recipe instanceof FurnaceRecipe && MaterialUtils.isOre(((FurnaceRecipe) recipe).getInput().getData())) {
+                return true;
             }
         }