qt: Use Q_OBJECT macro for QtInstanceFrame

Be consistent with other QtInstance* classes and
follow the recommendation in [1]:

> Notice that the Q_OBJECT macro is mandatory for any object that
> implements signals, slots or properties. You also need to run the Meta
> Object Compiler on the source file. We strongly recommend the use of
> this macro in all subclasses of QObject regardless of whether or not
> they actually use signals, slots and properties, since failure to do so
> may lead certain functions to exhibit strange behavior.

[1] https://doc.qt.io/qt-6/qobject.html#details

Change-Id: I9acd0fa95769959587ff14b95702e8306aa715da
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/202847
Tested-by: Jenkins
Reviewed-by: Michael Weghorn <m.weghorn@posteo.de>

0 files changed, 0 insertions, 0 deletions