Bugfix: Describe dblogsize option correctly (it refers to the wallet database, not memory pool)

src/wallet/db.cpp

@@ -293,7 +293,7 @@ void CDB::Flush()
     if (fReadOnly)
         nMinutes = 1;
 
-    bitdb.dbenv->txn_checkpoint(nMinutes ? GetArg("-dblogsize", 100) * 1024 : 0, nMinutes, 0);
+    bitdb.dbenv->txn_checkpoint(nMinutes ? GetArg("-dblogsize", DEFAULT_WALLET_DBLOGSIZE) * 1024 : 0, nMinutes, 0);
 }
 
 void CDB::Close()

src/wallet/db.h

@@ -20,6 +20,8 @@
 
 #include <db_cxx.h>
 
+static const unsigned int DEFAULT_WALLET_DBLOGSIZE = 100;
+
 extern unsigned int nWalletDBUpdated;
 
 class CDBEnv