Fix maybe unintialized warning for GrAutoLocaleSetter

Fix maybe unintialized warning for GrAutoLocaleSetter

In function void test_GLPrograms(skiatest::Reporter*, GrContextFactory*):
../../../src/gpu/GrAutoLocaleSetter.h:47:35: error:
als.GrAutoLocaleSetter::fOldLocale may be used uninitialized in this
function [-Werror=maybe-uninitialized]

From Build-Ubuntu-GCC-x86_64-Release-Trybot

Committed: https://skia.googlesource.com/skia/+/4222e19aeaf72ccfb61f83f4fe41010750161c74

[Kimmo Kinnunen, 2015-11-19 09:56:43]

http://build.chromium.org/p/client.skia.compile/builders/Build-Ubuntu-GCC-x86...

[Kimmo Kinnunen, 2015-11-19 10:15:18]

kkinnunen@nvidia.com changed reviewers:
+ bsalomon@google.com

[Kimmo Kinnunen, 2015-11-19 10:15:18]

For some reason, the AutoLocaleSetter starts to fail compile with the patch:
https://codereview.chromium.org/1446453003/

Here's the failure:
http://build.chromium.org/p/client.skia.compile/builders/Build-Ubuntu-GCC-x86...

[bsalomon, 2015-11-19 14:44:26]

lgtm

[Kimmo Kinnunen, 2015-11-19 16:33:39]

The CQ bit was checked by kkinnunen@nvidia.com

[commit-bot: I haz the power, 2015-11-19 16:33:44]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1456383002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1456383002/20001

[commit-bot: I haz the power, 2015-11-19 16:45:32]

Committed patchset #2 (id:20001) as
https://skia.googlesource.com/skia/+/4222e19aeaf72ccfb61f83f4fe41010750161c74