Fix build error (missing cast to void*)

Fix build error (missing cast to void*)

TBR=yangguo@chromium.org
BUG=

Committed: https://crrev.com/479e0c034736f7aab301daab190f5d8a58d20d7d
Cr-Commit-Position: refs/heads/master@{#30001}

[rossberg, 2015-08-04 13:36:25]

The CQ bit was checked by rossberg@chromium.org

[commit-bot: I haz the power, 2015-08-04 13:36:34]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1263043004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1263043004/1

[Yang, 2015-08-04 13:38:08]

On 2015/08/04 13:36:34, commit-bot: I haz the power wrote:
> CQ is trying da patch. Follow status at
>  https://chromium-cq-status.appspot.com/patch-status/1263043004/1
> View timeline at
>  https://chromium-cq-status.appspot.com/patch-timeline/1263043004/1

lgtm.

[commit-bot: I haz the power, 2015-08-04 14:23:11]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-08-04 14:24:43]

Patchset 1 (id:??) landed as
https://crrev.com/479e0c034736f7aab301daab190f5d8a58d20d7d
Cr-Commit-Position: refs/heads/master@{#30001}

[MTBrandyberry, 2015-08-04 15:17:58]

On 2015/08/04 14:24:43, commit-bot: I haz the power wrote:
> Patchset 1 (id:??) landed as
> https://crrev.com/479e0c034736f7aab301daab190f5d8a58d20d7d
> Cr-Commit-Position: refs/heads/master@{#30001}

Another instance of this same issue exists on line 916 in Scope::Print(int n) as
well.

[rossberg, 2015-08-04 15:25:25]

On 2015/08/04 15:17:58, mtbrandyberry wrote:
> On 2015/08/04 14:24:43, commit-bot: I haz the power wrote:
> > Patchset 1 (id:??) landed as
> > https://crrev.com/479e0c034736f7aab301daab190f5d8a58d20d7d
> > Cr-Commit-Position: refs/heads/master@{#30001}
> 
> Another instance of this same issue exists on line 916 in Scope::Print(int n)
as
> well.

Oops, thanks! Fixed here:

https://codereview.chromium.org/1264233005/