tdf#109085: don't assume MtaOleReq window is still valid at shutdown

The window can be destroyed by e.g. WM_QUERYENDSESSION/WM_ENDSESSION
sequence, and then the message MSG_REGCLIPVIEWER handler would not run
and the condition would never be set.

Since we need to wait for the message processed, let's just use sendMessage
which would return only after the message has been processed anyway, and
also will return immediately on failure (e.g., window handle invalid).

Also this changes other cases where postMessage + wait pattern was used,
and removes the condition from MsgContext.

Change-Id: Ic12deafbaedd1cc99b9d6145650d99069c618f0e
Reviewed-on: https://gerrit.libreoffice.org/62881
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
Tested-by: Jenkins
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>

0 files changed, 0 insertions, 0 deletions