The caller of Application::CreateMessageDialog owns the
returned message dialog.
So far, it was returned by a plain weld::MessageDialog*.
Return a unique_ptr instead, to make clear the ownership
semantics. (Also adjust SalInstance::CreateMessageDialog
accordingly, which is called by Application::CreateMessageDialog
and implements the actual logic to create a message dialog.)
Adjust callers where needed.
Most callers were already using a smart pointer for the
returned message dialog anyway.
Change-Id: I7c06bb24b611bd67f5af89800adb13bf22dcc6fa
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/211013
Reviewed-by: Michael Weghorn <m.weghorn@posteo.de>
Tested-by: Jenkins
Michael Weghorn
6a023bacb9