wallet2: clear found out for every tx key

Avoids triggering the sanity check

src/wallet/wallet2.cpp

@@ -1105,7 +1105,6 @@ void wallet2::process_new_transaction(const crypto::hash &txid, const cryptonote
   // (that is, the prunable stuff may or may not be included)
   if (!miner_tx && !pool)
     process_unconfirmed(txid, tx, height);
-  std::vector<size_t> outs;
   std::unordered_map<cryptonote::subaddress_index, uint64_t> tx_money_got_in_outs;  // per receiving subaddress index
   crypto::public_key tx_pub_key = null_pkey;
 
@@ -1123,6 +1122,7 @@ void wallet2::process_new_transaction(const crypto::hash &txid, const cryptonote
   uint64_t total_received_1 = 0;
   while (!tx.vout.empty())
   {
+    std::vector<size_t> outs;
     // if tx.vout is not empty, we loop through all tx pubkeys
 
     tx_extra_pub_key pub_key_field;