fix for https://jira.duraspace.org/browse/ISLANDORA-882 missing bottom control bar because tryin to split a null value
fix for https://jira.duraspace.org/browse/ISLANDORA-882 missing bottom control bar because tryin to split a null value

MorganDawe/islandora_internet_archive_bookreader,MorganDawe/islandora_internet_archive_bookreader