SPIGOT-7308: Fix NullPointerException when calling Jukebox#setRecord()

By: Parker Hawke <hawkeboyz2@hotmail.com>

paper-server/nms-patches/net/minecraft/world/level/block/entity/TileEntityJukeBox.patch

@@ -66,3 +66,16 @@
      }
  
      @Override
+@@ -203,7 +246,11 @@
+     @VisibleForTesting
+     public void setRecordWithoutPlaying(ItemStack itemstack) {
+         this.items.set(0, itemstack);
+-        this.level.updateNeighborsAt(this.getBlockPos(), this.getBlockState().getBlock());
++        // CraftBukkit start - add null check for level
++        if (level != null) {
++            this.level.updateNeighborsAt(this.getBlockPos(), this.getBlockState().getBlock());
++        }
++        // CraftBukkit end
+         this.setChanged();
+     }
+ }