seems to be a regression from...

commit 356bc0f6
Author: Michael Meeks <michael.meeks@collabora.com>
Date:   Wed Jul 1 19:03:55 2015 +0100

    tdf#92434 - fix iteration, and remember to disposeAndClear.

which is part of the VclPtr stuff

so hold the connection by VclPtr when removing it from m_vTableConnection
and only call dispose on it when _bDelete is true, not always.

Change-Id: I38e65c6928499dc1e8bbf6b71e9901a4eaa5d913