defensive code and format


git-svn-id: svn://oss.dbc.dk/sync_php/php/OpenLibrary/OpenBibdk/trunk@58742 30e9dc4a-7611-4fbc-83ba-eecf79b76bd0
typo


git-svn-id: svn://oss.dbc.dk/sync_php/php/OpenLibrary/OpenBibdk/trunk@58744 30e9dc4a-7611-4fbc-83ba-eecf79b76bd0