Add braces to meet code style on line-after-the-one-changed.

Github-Pull: #12368
Rebased-From: 02fc8863630a20e75230f8bc3ba1051c480ae560
Tree-SHA512: 8e159541f5270801fd3c70540ad3c55e93f0ba37039e651d21f65ba9b271bbbb2f1389b13a0f40fea337e88bb1711f498bb3ee1230ec2c40b6530846ff241a8b

src/validation.cpp

@@ -548,8 +548,9 @@ static bool AcceptToMemoryPoolWorker(const CChainParams& chainparams, CTxMemPool
     const uint256 hash = tx.GetHash();
     AssertLockHeld(cs_main);
     LOCK(pool.cs); // mempool "read lock" (held through GetMainSignals().TransactionAddedToMempool())
-    if (pfMissingInputs)
+    if (pfMissingInputs) {
         *pfMissingInputs = false;
+    }
 
     if (!CheckTransaction(tx, state))
         return false; // state filled in by CheckTransaction