throw statements fail inside eval statements

        Reviewed by mjs.

        * kjs/function.cpp:
        (KJS::GlobalFuncImp::call):
        Big change since I fixed the tabbing. The important part is:
        if (c.complType() == Throw)
          exec->setException(c.value());

        * kjs/nodes.cpp:
        (ThrowNode::execute): removed duplicate KJS_CHECKEXCEPTION
        (TryNode::execute):
        try now clears the exception state before the finally block executes,
        and checks the state after the block executes, so that exceptions in
        finally code get caught.

        * tests/mozilla/expected.html:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@9767 268f45cc-cd09-0410-ab3c-d52691b4dbfc