AIX: Fix 'may be used uninitialized' compiler errors

AIX: Fix 'may be used uninitialized' compiler errors

Fix additional cases where the AIX compiler reports that a variable
may be used uninitialized.

R=danno@chromium.org, michael_dawson@ca.ibm.com
BUG=

Committed: https://crrev.com/44b9f1e7ad20a2c70fe388afcdb92dead3e0973f
Cr-Commit-Position: refs/heads/master@{#30658}

[michael_dawson, 2015-09-03 23:06:01]

On 2015/09/03 22:19:12, mtbrandyberry wrote:

lgtm

[Jakob Kummerow, 2015-09-07 08:56:02]

jkummerow@chromium.org changed reviewers:
+ ulan@chromium.org
- danno@chromium.org

[Jakob Kummerow, 2015-09-07 08:56:03]

-danno +ulan for src/heap/ OWNERS approval. (Changes look fine, you can
rubberstamp.)

[MTBrandyberry, 2015-09-09 13:27:12]

On 2015/09/07 08:56:03, Jakob wrote:
> -danno +ulan for src/heap/ OWNERS approval. (Changes look fine, you can
> rubberstamp.)

Bump.  Still waiting on approval.

[ulan, 2015-09-09 14:05:24]

lgtm

[MTBrandyberry, 2015-09-09 14:18:52]

The CQ bit was checked by mbrandy@us.ibm.com

[commit-bot: I haz the power, 2015-09-09 14:19:05]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1323313003/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1323313003/20001

[commit-bot: I haz the power, 2015-09-09 14:55:30]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-09-09 14:55:58]

Patchset 2 (id:??) landed as
https://crrev.com/44b9f1e7ad20a2c70fe388afcdb92dead3e0973f
Cr-Commit-Position: refs/heads/master@{#30658}