Qt,Qt: THintWindow crash

Original Reporter info from Mantis: zeljko@holobit.net @zeljan1

• Reporter name: Zeljan Rikalo

Description:

As reported by Juha on mailing list, sometimes lazarus crashes when hint is shown on modal window and after closing modal window.
I've found the way how to reproduce it.

Steps to reproduce:

1.Start any application (which can show modal window and contains hints over controls)
2.Show modal window (be aware that first hint inside application should be shown over some control inside modal window)
3.Close modal window
4.Now try mouse over some control which should trigger hint show <-BENG
Problem is in TQtHintWindow.CreateWidget(), parent should not be assigned unless LCL says so.

Mantis conversion info:

• Mantis ID: 36773
• Fixed in revision: 62717 (#bb080874),62726 (#c98da657)