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There should no longer be uninitialized values reported when running CrOs build of Chrome on Linux with cross_fuzz under valgrind.

I believe the ALSA APIs should have been initializing all these values, but to be sure they are now initialized before making the calls.

BUG=chromium-os:11252
TEST=none

Review URL: http://codereview.chromium.org/6287012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@72670 0039d316-1c4b-4281-b951-d872f2087c98