Really should fix ALL tasks that aren't image tasks now.

git-svn-id: https://svn.code.sf.net/p/freeghost/code/trunk@1885 71f96598-fa45-0410-b640-bcd6f8691b32
One more go, again, to only have imaging tasks require an image.

git-svn-id: https://svn.code.sf.net/p/freeghost/code/trunk@1886 71f96598-fa45-0410-b640-bcd6f8691b32