add null checks

Author: CodeDoctorDE

src/main/java/com/github/codedoctorde/itemmods/api/block/CustomBlock.java

@@ -69,6 +69,7 @@ public void setType(String type) {
     public void breakBlock(BlockDropType dropType) {
         getBlock().setType(Material.AIR);
         getBlock().getDrops().clear();
+        if (config == null || dropType == null) return;
         Location dropLocation = getBlock().getLocation().clone().add(0.5, 0, 0.5);
         if (dropType == BlockDropType.SILK_TOUCH && config.getReferenceItemConfig() != null)
             getBlock().getWorld().dropItemNaturally(dropLocation, config.getReferenceItemConfig().giveItemStack());