tdf#103274 (4): Add default XCommandEnvironment reference

Change-Id: I67ab0f37df9e8d239374d9a759f7c082b824c722
Reviewed-on: https://gerrit.libreoffice.org/29981Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Giuseppe Castagno <giuseppe.castagno@acca-esse.eu>

sfx2/source/doc/objstor.cxx

@@ -789,7 +789,7 @@ bool SfxObjectShell::DoLoad( SfxMedium *pMed )
 
         try
         {
-            ::ucbhelper::Content aContent( pMedium->GetName(), css::uno::Reference < XCommandEnvironment >(), comphelper::getProcessComponentContext() );
+            ::ucbhelper::Content aContent( pMedium->GetName(), utl::UCBContentHelper::getDefaultCommandEnvironment(), comphelper::getProcessComponentContext() );
             css::uno::Reference < XPropertySetInfo > xProps = aContent.getProperties();
             if ( xProps.is() )
             {