This fixes VM state fetching from "tick" log records.

TBR=vitalyr@chromium.org
BUG=1287
TEST=none

Review URL: http://codereview.chromium.org/6718041

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7403 ce2b1a6d-e550-0410-aec6-3dcde31c8c00