Commits on Oct 4, 2016

  1. trivial: init all private object members of the database in qt 

    in particular this allows catching nullptr access on the ptr member
    @hsitter
    hsitter committed Oct 4, 2016
    478968c

  2. qt: nullptr access on unopened databases resulting in a crash

    @hsitter
    hsitter committed Oct 4, 2016
    49daa95

  3. qt: stop leaking as_pool instances 

    - only open once
- roll back on pool loading errors by unrefing the pool instance again
    @hsitter
    hsitter committed Oct 4, 2016
    784b10f