Merge pull request #351 from felixonmars/patch-1

Fix a typo in PPLNSPaymentScheme.cs

src/MiningCore/Payments/PaymentSchemes/PPLNSPaymentScheme.cs

@@ -228,7 +228,7 @@ private void LogDiscardedShares(PoolConfig poolConfig, Block block, DateTime val
                         done = true;
                     }
 
-                    // calulate reward
+                    // calculate reward
                     var reward = score * blockReward / window;
                     accumulatedScore += score;
                     blockRewardRemaining -= reward;