GCC apparently assumes that given that we do a static cast in the next
line the value must actually be in StrictModeFlag enum range (even
though this is actually what we are asserting)


Review URL: http://codereview.chromium.org/6670031

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7147 ce2b1a6d-e550-0410-aec6-3dcde31c8c00