Revert determinant-based ScaleTranslate inverse. 
The current code fails the unit tests on Ubuntu32 Release. 
This will pass the tests, and also removes sk_bzero().

R=reed@google.com, robertphillips@google.com, shawnsingh@chromium.org

Author: jvanverth@google.com

Review URL: https://chromiumcodereview.appspot.com/23477020

git-svn-id: http://skia.googlecode.com/svn/trunk@11006 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed