fdo#38838 Replacement of the String with OUString

Change-Id: I1feaa0bee39868aedd768202b584cabc1010f4d6
Reviewed-on: https://gerrit.libreoffice.org/3958Reviewed-by: Norbert Thiebaud <nthiebaud@gmail.com>
Tested-by: Norbert Thiebaud <nthiebaud@gmail.com>

cui/source/tabpages/tabarea.cxx

@@ -135,7 +135,7 @@ void SvxAreaTabDialog::SavePalettes()
 
     // save the tables when they have been changed
 
-    const String aPath( SvtPathOptions().GetPalettePath() );
+    const OUString aPath( SvtPathOptions().GetPalettePath() );
 
     if( mnHatchingListState & CT_MODIFIED )
     {