libtools: 0->nullptr
@@ -440,7 +440,7 @@ void BackendBuilder::addPlugin (PluginSpec const & plugin)
checkConfPtr checkConfFunction = reinterpret_cast<checkConfPtr> (pluginDatabase->getSymbol (newPlugin, "checkconf"));
if (checkConfFunction)
{
- ckdb::Key * errorKey = ckdb::keyNew (0);
+ ckdb::Key * errorKey = ckdb::keyNew (nullptr);
// merge plugin config and backend config together
ckdb::KeySet * pluginConfig = newPlugin.getConfig ().dup ();
