Fix assertion broken by recent revision.
Fix assertion broken by recent revision.

R=yangguo@chromium.org
TEST=mjsunit/keyed-call-ic

Review URL: http://codereview.chromium.org/8688008

git-svn-id: b158db1e4b4ab85d4c9e510fdef4b1e8c614b15b@10068 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh