better check for invalid rels object


git-svn-id: svn://oss.dbc.dk/sync_php/php/OpenLibrary/OpenBibdk/trunk@61613 30e9dc4a-7611-4fbc-83ba-eecf79b76bd0
unit.id from solr: array or scalar


git-svn-id: svn://oss.dbc.dk/sync_php/php/OpenLibrary/OpenBibdk/trunk@61618 30e9dc4a-7611-4fbc-83ba-eecf79b76bd0
typo $$ should be $


git-svn-id: svn://oss.dbc.dk/sync_php/php/OpenLibrary/OpenBibdk/trunk@61620 30e9dc4a-7611-4fbc-83ba-eecf79b76bd0