Merge r6189 to trunk.

This fixes a bug that could potentially cause a crash during deoptimization.

BUG=1014

TEST=

Review URL: http://codereview.chromium.org/5969012

git-svn-id: http://v8.googlecode.com/svn/trunk@6190 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2 files changed