fix: mempool_no shows zero

src/MempoolStatus.cpp

@@ -193,11 +193,12 @@ MempoolStatus::read_mempool()
     // clear current mempool txs vector
     // repopulate it with each execution of read_mempool()
     // not very efficient but good enough for now.
-    mempool_txs = std::move(local_copy_of_mempool_txs);
 
     mempool_no   = local_copy_of_mempool_txs.size();
     mempool_size = mempool_size_kB;
 
+    mempool_txs = std::move(local_copy_of_mempool_txs);
+
     return true;
 }