Importer: Handle empty material name more gracefully
Importer: Handle empty material name more gracefully

ThiefMaster/indico-plugins,indico/indico-plugins,indico/indico-plugins,ThiefMaster/indico-plugins,ThiefMaster/indico-plugins,ThiefMaster/indico-plugins,indico/indico-plugins,indico/indico-plugins