Some WebDAV server answer without 'DAV:' XML namespace.

The call to assert() is not appropriate, better use a SAL_WARN_IF
instead.

The call to DAVProperties::createUCBPropName() method immediately
after will take care of the missing namespace.

The change to assert() was introduced in commit
dd9c15b3

Change-Id: Ib9b85426fc84907fb12f70759a189cedcf117b3a
Reviewed-on: https://gerrit.libreoffice.org/20380Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

ucb/source/ucp/webdav-neon/NeonPropFindRequest.cxx

@@ -109,7 +109,7 @@ extern "C" int NPFR_propfind_iter( void* userdata,
     DAVPropertyValue thePropertyValue;
     thePropertyValue.IsCaseSensitive = true;
 
-    assert( pname->nspace && "NPFR_propfind_iter - No namespace!" );
+    SAL_WARN_IF( !pname->nspace, "ucb.ucp.webdav", "NPFR_propfind_iter - No XML namespace!" );
 
     DAVProperties::createUCBPropName( pname->nspace,
                                       pname->name,