Fix potentially uninitialized value.

Fix potentially uninitialized value.

Depending on what ReadOK does it's possible for |dircount16| to be used without
being initialized. The read code calls back into PDFium specific code which then
calls into the stream reading code.

Initialize the value to be sure it is set.

BUG=chromium:651632
Committed: https://pdfium.googlesource.com/pdfium/+/76383db4906c9357292846ace77566b34eb47de9

[dsinclair, 2016-10-03 20:45:06]

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

[dsinclair, 2016-10-03 20:45:06]

PTAL.

I don't know if this is worth upstreaming as the actual implementation code it
calls down into is PDFium specific.

[dsinclair, 2016-10-03 20:45:11]

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

[commit-bot: I haz the power, 2016-10-03 20:45:19]

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

[Lei Zhang, 2016-10-03 20:57:54]

lgtm

[commit-bot: I haz the power, 2016-10-03 20:58:52]

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

[commit-bot: I haz the power, 2016-10-03 20:58:54]

Dry run: This issue passed the CQ dry run.

[dsinclair, 2016-10-03 20:59:36]

The CQ bit was checked by dsinclair@chromium.org

[commit-bot: I haz the power, 2016-10-03 20:59:43]

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, 2016-10-03 20:59:58]

Description was changed from

==========
Fix potentially uninitialized value.

Depending on what ReadOK does it's possible for |dircount16| to be used without
being initialized. The read code calls back into PDFium specific code which then
calls into the stream reading code.

Initialize the value to be sure it is set.

BUG=chromium:651632
==========

to

==========
Fix potentially uninitialized value.

Depending on what ReadOK does it's possible for |dircount16| to be used without
being initialized. The read code calls back into PDFium specific code which then
calls into the stream reading code.

Initialize the value to be sure it is set.

BUG=chromium:651632

Committed:
https://pdfium.googlesource.com/pdfium/+/76383db4906c9357292846ace77566b34eb4...
==========

[commit-bot: I haz the power, 2016-10-03 20:59:59]

Committed patchset #1 (id:1) as
https://pdfium.googlesource.com/pdfium/+/76383db4906c9357292846ace77566b34eb4...