Fix stack exhaustion in CPDF_DataAvail::HaveResourceAncestor()

Fix stack exhaustion in CPDF_DataAvail::HaveResourceAncestor()

BUG=https://code.google.com/p/pdfium/issues/detail?id=113
R=thestig@chromium.org

Committed: https://pdfium.googlesource.com/pdfium/+/0c01ad05afe4dbc36c6aa32a10a0f98eb677d4be

[Tom Sepez, 2015-02-02 22:50:01]

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

[Tom Sepez, 2015-02-02 22:50:28]

And one more place where we hit the stack exhaustion issue.

[Tom Sepez, 2015-02-02 23:03:05]

Lei, please review.  I expect this to remain a common issue because we don't
want to DFS all the objects in the file to allow incremental loading ...

[Tom Sepez, 2015-02-02 23:04:57]

(Resisting the tempation to convert tail recursion to iteration).

[Lei Zhang, 2015-02-04 00:02:37]

lgtm

[Lei Zhang, 2015-02-04 00:03:06]

On 2015/02/04 00:02:37, Lei Zhang wrote:
> lgtm

Actually, do you need to add a test to load bug_113.pdf?

[Tom Sepez, 2015-02-04 00:08:47]

> Actually, do you need to add a test to load bug_113.pdf?
Uh, yes.  Nice catch.  Wonder how that got lost along the way.

[Tom Sepez, 2015-02-04 00:16:01]

New patchsets have been uploaded after l-g-t-m from thestig@chromium.org

[Lei Zhang, 2015-02-04 00:17:21]

lgtm

[Tom Sepez, 2015-02-04 00:17:24]

New patchsets have been uploaded after l-g-t-m from thestig@chromium.org

[Tom Sepez, 2015-02-04 00:18:23]

Committed patchset #3 (id:40001) manually as
0c01ad05afe4dbc36c6aa32a10a0f98eb677d4be (presubmit successful).