tdf#148654 stop playing sound with presentation ends

Change-Id: I74aa4cd966b6966f7826d241fcf9bb9d64955464
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/133394
Tested-by: Jenkins
Reviewed-by: Xisco Fauli <xiscofauli@libreoffice.org>
diff --git a/sd/source/ui/slideshow/slideshowimpl.cxx b/sd/source/ui/slideshow/slideshowimpl.cxx
index 0c775d2..ecb9663 100644
--- a/sd/source/ui/slideshow/slideshowimpl.cxx
+++ b/sd/source/ui/slideshow/slideshowimpl.cxx
@@ -1350,6 +1350,8 @@ IMPL_LINK_NOARG(SlideshowImpl, endPresentationHdl, void*, void)
{
    mnEndShowEvent = nullptr;

    stopSound();

    if( mxPresentation.is() )
        mxPresentation->end();
}