Maybe work around and only insert if there's data.

git-svn-id: https://svn.code.sf.net/p/freeghost/code/trunk@2390 71f96598-fa45-0410-b640-bcd6f8691b32
Maybe more fix to select case.  Fix HostManagementPage manual host add to set primary mac.

git-svn-id: https://svn.code.sf.net/p/freeghost/code/trunk@2391 71f96598-fa45-0410-b640-bcd6f8691b32