rpc: do not include output indices for pool txes

Those aren't yet in the blockchain, so will not be found
(and aren't yet known, since it depends on where exactly the
tx will be mined in the next block or blocks)

src/rpc/core_rpc_server.cpp

@@ -425,7 +425,9 @@ namespace cryptonote
       if (req.decode_as_json)
         res.txs_as_json.push_back(e.as_json);
 
-      // output indices too
+      // output indices too if not in pool
+      if (pool_tx_hashes.find(tx_hash) == pool_tx_hashes.end())
+      {
         bool r = m_core.get_tx_outputs_gindexs(tx_hash, e.output_indices);
         if (!r)
         {
@@ -433,6 +435,7 @@ namespace cryptonote
           return false;
         }
       }
+    }
 
     BOOST_FOREACH(const auto& miss_tx, missed_txs)
     {