Trac #21810
Signed-off-by: Nicolas Capens

I don't think it was possible to use the sharehandle passed in, and if one was, we shouldn't clear it on release()

git-svn-id: https://angleproject.googlecode.com/svn/branches/dx11proto@1352 736b8ea6-26fd-11df-bfd4-992fa37f6226