fix claim when locked amount is 0 (#150)

* fix claim when locked amount is 0

* feat: use bn api with `n` suffix if an arg is number

it is faster

---------

Co-authored-by: Roman <irolgin@gmail.com>

packages/distributor/solana/client.ts

@@ -180,7 +180,9 @@ export default class SolanaDistributorClient {
       ixs.push(newClaim(args, accounts, this.programId));
     }
 
-    ixs.push(claimLocked(accounts, this.programId));
+    if (data.amountLocked.gtn(0)) {
+      ixs.push(claimLocked(accounts, this.programId));
+    }
 
     const { tx, hash } = await prepareTransaction(this.connection, ixs, invoker.publicKey);
     const signature = await wrappedSignAndExecuteTransaction(this.connection, invoker, tx, hash);