Fix obvious bug in KTX encoder.

Fix obvious bug in KTX encoder.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2383523002

Committed: https://skia.googlesource.com/skia/+/2b7394b9fbfc6f430dc0ee1c1e9505fe5c736838

[dogben, 2016-09-29 14:30:40]

Description was changed from

==========
Fix obvious bug in KTX encoder.

BUG=skia:
==========

to

==========
Fix obvious bug in KTX encoder.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2383523002
==========

[dogben, 2016-09-29 14:30:52]

The CQ bit was checked by benjaminwagner@google.com to run a CQ dry run

[commit-bot: I haz the power, 2016-09-29 14:30:58]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-09-29 14:59:56]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-09-29 14:59:57]

Dry run: This issue passed the CQ dry run.

[dogben, 2016-09-29 15:05:39]

benjaminwagner@google.com changed reviewers:
+ msarett@google.com

[msarett, 2016-09-29 15:09:38]

msarett@google.com changed reviewers:
+ scroggo@google.com

[msarett, 2016-09-29 15:09:39]

Wow LGTM!

Leon, do you know anything about the history of third_party/ktx?  When was it
checked in?  Did we write it ourselves or take a snapshot of a library?

[msarett, 2016-09-29 15:14:27]

Looks like we checked in (and maintain it) ourselves.  Bug comes from the second
CL.
https://codereview.chromium.org/302333002
https://codereview.chromium.org/312353003

[dogben, 2016-09-29 15:19:48]

The CQ bit was checked by benjaminwagner@google.com

[commit-bot: I haz the power, 2016-09-29 15:19:51]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-09-29 15:20:43]

Description was changed from

==========
Fix obvious bug in KTX encoder.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2383523002
==========

to

==========
Fix obvious bug in KTX encoder.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2383523002

Committed:
https://skia.googlesource.com/skia/+/2b7394b9fbfc6f430dc0ee1c1e9505fe5c736838
==========

[commit-bot: I haz the power, 2016-09-29 15:20:44]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/2b7394b9fbfc6f430dc0ee1c1e9505fe5c736838