mariadb_query callback problem

[CrosRoad95]

Callback in mariadb_query isn't triggered when query has error, it cause you can't get error by mariadb_errno function.
mariadb_errno returns correct error id right after mariadb_await_query call

[Talos]

Looks like this event was not documented until now: https://dev.playonset.com/wiki/OnQueryError