Fix GCMole after r14476

R=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/13945026

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14482 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fix bug in CompareNil IC

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/13863022

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14483 ce2b1a6d-e550-0410-aec6-3dcde31c8c00