Don't use callback after Stop().

Fixes a crash where HandleError() attempts to notify the callback
after it has been set to NULL.  Also forces a waveInReset() prior
to every waveInClose() in case Start() was never called.

BUG=176550
TEST=none


Review URL: https://chromiumcodereview.appspot.com/12282006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@183472 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed