Slight logic change in RecordUpdate.

Author: mbutrovich

Diff for: src/concurrency/transaction_context.cpp

@@ -115,10 +115,13 @@ void TransactionContext::RecordUpdate(const ItemPointer &location) {
                  (rw_set_[location] != RWType::DELETE &&
                   rw_set_[location] != RWType::INS_DEL));
   auto rw_set_it = rw_set_.find(location);
-  if (rw_set_it != rw_set_.end() && (rw_set_it->second == RWType::READ ||
-                                     rw_set_it->second == RWType::READ_OWN)) {
-    rw_set_it->second = RWType::UPDATE;
+  if (rw_set_it != rw_set_.end() {
+    if (rw_set_it->second == RWType::READ || rw_set_it->second == RWType::READ_OWN) {
+      rw_set_it->second = RWType::UPDATE;
+    }
+    return;
   }
+  rw_set_[location] = RWType::UPDATE;
 }
 
 void TransactionContext::RecordInsert(const ItemPointer &location) {