tdf#103274 (10): Add default XCommandEnvironment reference

Change-Id: Ic91553a513656b412bccd73a483ca7d7f131b657
Reviewed-on: https://gerrit.libreoffice.org/30047Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Giuseppe Castagno <giuseppe.castagno@acca-esse.eu>

sfx2/source/dialog/filedlghelper.cxx

@@ -2031,7 +2031,9 @@ namespace
             sPathCheck += ".";
             try
             {
-                ::ucbhelper::Content aContent( sPathCheck, uno::Reference< ucb::XCommandEnvironment >(), comphelper::getProcessComponentContext() );
+                ::ucbhelper::Content aContent( sPathCheck,
+                                               utl::UCBContentHelper::getDefaultCommandEnvironment(),
+                                               comphelper::getProcessComponentContext() );
                 bValid = aContent.isFolder();
             }
             catch( const Exception& ) {}