Remove a stray double assign that g++ 4.8 thinks has ill-defined sequencing.

BUG=
R=bungeman@google.com

Review URL: https://codereview.chromium.org/21352003

git-svn-id: http://skia.googlecode.com/svn/trunk@10462 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed