Added null notification on enchant command

Author: LoJoSho

src/main/java/com/lojosho/enchantnow/commands/EnchantCommand.java

@@ -78,6 +78,7 @@ private static void addEnchantItem(String[] args, CommandSender sender, ItemStac
             for (Enchantment enchant : hashyEnchants.keySet()) {
 
                 if (enchant == null) {
+                    SendMessageUtil.sendStringMessage(player, "Enchantment was null.");
                     return;
                 }