Fix 'mempool min fee not met' debug output

Output the value that is tested, rather than the unmodified fee value.

src/validation.cpp

@@ -712,7 +712,7 @@ static bool AcceptToMemoryPoolWorker(const CChainParams& chainparams, CTxMemPool
 
         CAmount mempoolRejectFee = pool.GetMinFee(gArgs.GetArg("-maxmempool", DEFAULT_MAX_MEMPOOL_SIZE) * 1000000).GetFee(nSize);
         if (!bypass_limits && mempoolRejectFee > 0 && nModifiedFees < mempoolRejectFee) {
-            return state.DoS(0, false, REJECT_INSUFFICIENTFEE, "mempool min fee not met", false, strprintf("%d < %d", nFees, mempoolRejectFee));
+            return state.DoS(0, false, REJECT_INSUFFICIENTFEE, "mempool min fee not met", false, strprintf("%d < %d", nModifiedFees, mempoolRejectFee));
         }
 
         // No transactions are allowed below minRelayTxFee except from disconnected blocks