Skip the channel if there is no data.

Skip the channel if there is no data.

The JPX decoder needs to verify there is data associated with an image channel
before access. This was already done in one side of the if() but seems to be
missing from the other.

This Cl updates the loop to check the existance of channel data and to continue
iteration if none found.

BUG=chromium:637232
Committed: https://pdfium.googlesource.com/pdfium/+/07f5fd57682700bcbba20f01d52a806676fd02ff

[dsinclair, 2016-08-29 20:43:12]

The CQ bit was checked by dsinclair@chromium.org to run a CQ dry run

[dsinclair, 2016-08-29 20:43:29]

dsinclair@chromium.org changed reviewers:
+ thestig@chromium.org, weili@chromium.org

[dsinclair, 2016-08-29 20:43:29]

PTAL.

[commit-bot: I haz the power, 2016-08-29 20:43:54]

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, 2016-08-29 21:04:47]

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

[commit-bot: I haz the power, 2016-08-29 21:04:48]

Dry run: This issue passed the CQ dry run.

[Lei Zhang, 2016-08-29 22:43:05]

The CQ bit was checked by thestig@chromium.org

[Lei Zhang, 2016-08-29 22:43:05]

lgtm

[commit-bot: I haz the power, 2016-08-29 22:43:14]

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, 2016-08-29 22:43:32]

Description was changed from

==========
Skip the channel if there is no data.

The JPX decoder needs to verify there is data associated with an image channel
before access. This was already done in one side of the if() but seems to be
missing from the other.

This Cl updates the loop to check the existance of channel data and to continue
iteration if none found.

BUG=chromium:637232
==========

to

==========
Skip the channel if there is no data.

The JPX decoder needs to verify there is data associated with an image channel
before access. This was already done in one side of the if() but seems to be
missing from the other.

This Cl updates the loop to check the existance of channel data and to continue
iteration if none found.

BUG=chromium:637232

Committed:
https://pdfium.googlesource.com/pdfium/+/07f5fd57682700bcbba20f01d52a806676fd...
==========

[commit-bot: I haz the power, 2016-08-29 22:43:33]

Committed patchset #1 (id:1) as
https://pdfium.googlesource.com/pdfium/+/07f5fd57682700bcbba20f01d52a806676fd...