[dak/master] dak/clean_suites.py (check_sources): af_bin.last_used can be NULL

[Ansgar Burchardt <ansgar@debian.org>]

---
 dak/clean_suites.py |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/dak/clean_suites.py b/dak/clean_suites.py
index e7808ec..f16474b 100755
--- a/dak/clean_suites.py
+++ b/dak/clean_suites.py
@@ -138,7 +138,7 @@ def check_sources(now_date, session):
                               JOIN binaries b ON af_bin.file_id = b.file
                              WHERE b.source = df.source
                                AND af_bin.archive_id = af.archive_id
-                               AND af_bin.last_used > ad.delete_date)
+                               AND (af_bin.last_used IS NULL OR af_bin.last_used > ad.delete_date))
           OR EXISTS (SELECT 1 FROM extra_src_references esr
                          JOIN bin_associations ba ON esr.bin_id = ba.bin
                          JOIN binaries b ON ba.bin = b.id
-- 
1.7.2.5