Reviewed by Kevin.

    Reviewed by Kevin.

        - fixed <rdar://problem/3816097> REGRESSION: mailblocks, and presumably many other pages, failing because variable not found

        * kjs/internal.cpp: (InterpreterImp::evaluate): Process variable declarations before executing
        the program. We were doing this properly for functions, but not entire programs.

        - fixed <rdar://problem/3814706> REGRESSION: text fields in mailblocks wizards do not accept keystrokes due to use of charCodeAt()

        * kjs/string_object.cpp: (StringProtoFuncImp::call): Changed the implementation of charAt
        and charCodeAt to treat a missing parameter as an index of 0, rather than an invalid index.

        * tests/mozilla/expected.html: Update for two tests that now pass with these changes.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@7682 268f45cc-cd09-0410-ab3c-d52691b4dbfc