12418: Explicitly check if collection is not None
authorPeter Amstutz <peter.amstutz@curoverse.com>
Tue, 10 Oct 2017 15:19:47 +0000 (11:19 -0400)
committerPeter Amstutz <peter.amstutz@curoverse.com>
Tue, 10 Oct 2017 17:36:31 +0000 (13:36 -0400)
The empty collection evaluates to False, so it is necessary to explicitly check
for "not None".

Arvados-DCO-1.1-Signed-off-by: Peter Amstutz <pamstutz@veritasgenetics.com>


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