don't report minversion wallet entry as unknown

src/wallet/walletdb.cpp

@@ -509,7 +509,8 @@ ReadKeyValue(CWallet* pwallet, CDataStream& ssKey, CDataStream& ssValue,
                 strErr = "Error reading wallet database: Unknown non-tolerable wallet flags found";
                 return false;
             }
-        } else if (strType != "bestblock" && strType != "bestblock_nomerkle") {
+        } else if (strType != "bestblock" && strType != "bestblock_nomerkle" &&
+                strType != "minversion") {
             wss.m_unknown_records++;
         }
     } catch (...)