tdf#133633 winaccessibility: Add null check

The call to 'AccObjectManagerAgent::GetIAccessibleFromResID'
may set 'pImAcc' to nullptr here (s.
'AccObjectWinManager::GetIAccessibleFromResID', which is called
from there), so handle that case gracefully.

Change-Id: I0dbd48974fd012ff086835b147cd9b9cfc8a052b
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/95430
Tested-by: Jenkins
Reviewed-by: Michael Weghorn <m.weghorn@posteo.de>
(cherry picked from commit f5f9cac0c5f04246718c438b4673b36e803fda29)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/95420
Reviewed-by: Michael Stahl <michael.stahl@cib.de>
(cherry picked from commit bf5e0dc9bd54069f57f41de8746dc29d0ec41061)

0 files changed, 0 insertions, 0 deletions