patch warning and error in log

[Sun May 04 06:24:04 2014] [error] [client 131.152.226.242] PHP Notice:  Undefined index: filter_str_mv in /usr/local/vufind/httpd/module/Swissbib/src/Swissbib/RecordDriver/SolrMarc.php on line 1521, referer: http://sfx.ethz.ch/sfx_locater?sid=ALEPH:EBI01&genre=book&isbn=978-3-486-59832-2
[Sun May 04 06:24:04 2014] [error] [client 131.152.226.242] PHP Warning:  in_array() expects parameter 2 to be array, null given in /usr/local/vufind/httpd/module/Swissbib/src/Swissbib/RecordDriver/SolrMarc.php on line 1522, referer: http://sfx.ethz.ch/sfx_locater?sid=ALEPH:EBI01&genre=book&isbn=978-3-486-59832-2