Fix crash when Fetcher web_archive null, a=chris

Author Chris Pollett <chris@pollett.org>
Author date 2020-06-25 21:Jun:th
Author local date 2020-06-25 14:Jun:th -0700
Committer Chris Pollett <chris@pollett.org>
Committer date 2020-06-25 21:Jun:th
Committer local date 2020-06-25 14:Jun:th -0700
Commit 40ad8486c01f594416b2abbc5cddb019274789f2
Tree 4fe1d3dd8c277e27dc95f844d1eb03fb10d583ad
Parent eb9cf5b2582c3d7e171e654e9873c17a3b6b5542
Fix crash when Fetcher web_archive null, a=chris
Affected files:
src/controllers/ResourceController.php
src/executables/Fetcher.php
src/executables/QueueServer.php
src/library/StochasticTermSegmenter.php
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