Fix NULL timestamps on MySQL 5.0

We need to declare a nullable TIMESTAMP column as:

  removed_on TIMESTAMP NULL DEFAULT NULL

as this is a "feature" of MySQL, per [1].

[1] http://dev.mysql.com/doc/refman/5.0/en/timestamp.html

Change-Id: I6008657c641764d2c7f1873be5f9d5c9c82431f0
Signed-off-by: Shawn O. Pearce <sop@google.com>
1 file changed