Fix setItem with air on chiseled bookshelves

patches/server/0967-Fix-chiseled-bookshelf-setItem-with-air.patch

@@ -0,0 +1,19 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Nassim Jahnke <nassim@njahnke.dev>
+Date: Sat, 18 Mar 2023 18:51:33 +0100
+Subject: [PATCH] Fix chiseled bookshelf setItem with air
+
+
+diff --git a/src/main/java/net/minecraft/world/level/block/entity/ChiseledBookShelfBlockEntity.java b/src/main/java/net/minecraft/world/level/block/entity/ChiseledBookShelfBlockEntity.java
+index 6986b2a5df34bfe078c902594f6409ad0ea847ef..ed12a23448dc9ada423ebd79a131eab2de3d6e48 100644
+--- a/src/main/java/net/minecraft/world/level/block/entity/ChiseledBookShelfBlockEntity.java
++++ b/src/main/java/net/minecraft/world/level/block/entity/ChiseledBookShelfBlockEntity.java
+@@ -146,7 +146,7 @@ public class ChiseledBookShelfBlockEntity extends BlockEntity implements Contain
+ 
+     @Override
+     public void setItem(int slot, ItemStack stack) {
+-        if (stack.is(ItemTags.BOOKSHELF_BOOKS)) {
++        if (stack.isEmpty() || stack.is(ItemTags.BOOKSHELF_BOOKS)) { // Paper
+             this.items.set(slot, stack);
+             this.updateState(slot);
+         }