Validate using_converts_to for food component (#10931)

patches/server/0970-General-ItemMeta-fixes.patch

@@ -1499,7 +1499,7 @@ index 8b407a33b04af6ae396ada0b8aca7dc246d314ef..d204845cf0b9de00589593469755cb8e
 +    // Paper end - General ItemMeta Fixes
  }
 diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/components/CraftFoodComponent.java b/src/main/java/org/bukkit/craftbukkit/inventory/components/CraftFoodComponent.java
-index 63fc9138dc3388ceb9acf672b3f75ba0976e8e54..cad52601583c1f304f94de954c4d18a6005906e3 100644
+index 63fc9138dc3388ceb9acf672b3f75ba0976e8e54..5986aa3588487c2caef4c895f8883e38a674b61c 100644
 --- a/src/main/java/org/bukkit/craftbukkit/inventory/components/CraftFoodComponent.java
 +++ b/src/main/java/org/bukkit/craftbukkit/inventory/components/CraftFoodComponent.java
 @@ -109,6 +109,7 @@ public final class CraftFoodComponent implements FoodComponent {
@@ -1510,7 +1510,15 @@ index 63fc9138dc3388ceb9acf672b3f75ba0976e8e54..cad52601583c1f304f94de954c4d18a6
          this.handle = new FoodProperties(this.handle.nutrition(), this.handle.saturation(), this.handle.canAlwaysEat(), eatSeconds, this.handle.usingConvertsTo(), this.handle.effects());
      }
  
-@@ -134,6 +135,7 @@ public final class CraftFoodComponent implements FoodComponent {
+@@ -119,6 +120,7 @@ public final class CraftFoodComponent implements FoodComponent {
+ 
+     @Override
+     public void setUsingConvertsTo(ItemStack item) {
++        Preconditions.checkArgument(item == null || !item.isEmpty(), "Item cannot be empty"); // Paper - validate using_converts_to
+         this.handle = new FoodProperties(this.handle.nutrition(), this.handle.saturation(), this.handle.canAlwaysEat(), this.handle.eatSeconds(), Optional.ofNullable(item).map(CraftItemStack::asNMSCopy), this.handle.effects());
+     }
+ 
+@@ -134,6 +136,7 @@ public final class CraftFoodComponent implements FoodComponent {
  
      @Override
      public FoodEffect addEffect(PotionEffect effect, float probability) {