Corentin Wallez 45f9185de5 generator_lib.py: correctly handle lack of --jinja2-path.
Python's list.index() method raises an exception when the item isn't
present in the list. Fix this check that was instead expecting a
negative index.

BUG=dawn:225

Change-Id: I8e67d71ff7384f49533a95d5cbe04da1cf7bb0bc
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/11301
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Kai Ninomiya <kainino@chromium.org>
2019-09-18 00:59:40 +00:00
..