tdf#115407: preselect sound file saved

To display the sound in the dropbox, the complete filename
(eg: file:///home/julien/lo/libreoffice/instdir/share/gallery/sounds/pluck.wav)
was compared with items of the sound list formed like this:
file:///home/julien/lo/libreoffice/instdir/program/../share/gallery/sounds/pluck.wav

See https://bugs.documentfoundation.org/show_bug.cgi?id=115407#c1

Since listbox displays only basename, let's just compare basenames

Change-Id: I5fb49990322423fa7818e5d6e1cafd828e3500ec
Reviewed-on: https://gerrit.libreoffice.org/52476
(cherry picked from commit 23c82e1a)
Reviewed-on: https://gerrit.libreoffice.org/52490Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

sd/source/ui/animations/SlideTransitionPane.cxx

@@ -270,10 +270,11 @@ struct lcl_EqualsSoundFileName : public ::std::unary_function< OUString, bool >
     {
         // note: formerly this was a case insensitive search for all
         // platforms. It seems more sensible to do this platform-dependent
+        INetURLObject aURL(rStr);
 #if defined(_WIN32)
-        return maStr.equalsIgnoreAsciiCase( rStr );
+        return maStr.equalsIgnoreAsciiCase( aURL.GetBase() );
 #else
-        return maStr == rStr;
+        return maStr == aURL.GetBase();
 #endif
     }
 
@@ -286,9 +287,10 @@ bool lcl_findSoundInList( const ::std::vector< OUString > & rSoundList,
                           const OUString & rFileName,
                           ::std::vector< OUString >::size_type & rOutPosition )
 {
+    INetURLObject aURL(rFileName);
     ::std::vector< OUString >::const_iterator aIt =
           ::std::find_if( rSoundList.begin(), rSoundList.end(),
-                          lcl_EqualsSoundFileName( rFileName ));
+                          lcl_EqualsSoundFileName( aURL.GetBase()));
     if( aIt != rSoundList.end())
     {
         rOutPosition = ::std::distance( rSoundList.begin(), aIt );