Fix NPE in OCLC2011 (#124)
Fix NPE in OCLC2011 (#124)

thesebas/opacclient,thesebas/opacclient,thesebas/opacclient,opacapp/opacclient,opacapp/opacclient,opacapp/opacclient,raphaelm/opacclient,hurzl/opacclient,johan12345/opacclient,geomcmaster/opacclient,johan12345/opacclient,johan12345/opacclient,ruediger-w/opacclient,hurzl/opacclient,johan12345/opacclient,geomcmaster/opacclient,geomcmaster/opacclient,johan12345/opacclient,ruediger-w/opacclient,ruediger-w/opacclient,opacapp/opacclient,simon04/opacclient,ruediger-w/opacclient,opacapp/opacclient,ruediger-w/opacclient,hurzl/opacclient,raphaelm/opacclient,raphaelm/opacclient,simon04/opacclient,simon04/opacclient