fix(arabot): bug that breaks the economy

src/commands/economy/pay.ts

@@ -140,6 +140,13 @@ export class BalanceCommand extends Command {
       success: false,
     };
 
+    // Check the amount to be paid is greater than 0
+    if (amount < 1) {
+      info.message = 'You need to actually give money, you can\'t send nothing or try to break the'
+          + 'economy 😭';
+      return info;
+    }
+
     const member = guild.members.cache.get(user.id);
     const recipientMember = guild.members.cache.get(recipient.id);