Allow blank source in cover.
authorRadek Czajka <radekczajka@nowoczesnapolska.org.pl>
Mon, 3 Feb 2014 09:40:19 +0000 (10:40 +0100)
committerRadek Czajka <radekczajka@nowoczesnapolska.org.pl>
Mon, 3 Feb 2014 09:40:19 +0000 (10:40 +0100)
commitb0a8c8c35c488e1fa37d59cdf2b0048c31263900
treefdfa7b6f37aa2425ea69a4a12c33d7d4b2c8c802
parentc3d135f90804db7231063cb0aa6e525a55a67bfa
Allow blank source in cover.
apps/cover/models.py