tdf#103274 (5): Add default XCommandEnvironment reference

Change-Id: I77e89d1250499687c6fadc4408c1bed409f8b167
Reviewed-on: https://gerrit.libreoffice.org/29982Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Giuseppe Castagno <giuseppe.castagno@acca-esse.eu>

sfx2/source/doc/objstor.cxx

@@ -1703,7 +1703,7 @@ bool SfxObjectShell::SaveTo_Impl
     {
         try
         {
-            ::ucbhelper::Content aContent( rMedium.GetName(), css::uno::Reference < XCommandEnvironment >(), comphelper::getProcessComponentContext() );
+            ::ucbhelper::Content aContent( rMedium.GetName(), utl::UCBContentHelper::getDefaultCommandEnvironment(), comphelper::getProcessComponentContext() );
             css::uno::Reference < XPropertySetInfo > xProps = aContent.getProperties();
             if ( xProps.is() )
             {