Correctly check length when allocating string.

Correctly check length when allocating string.


R=jkummerow@chromium.org
BUG=
TEST=regress-regexp-overflow.js

Committed: https://code.google.com/p/v8/source/detail?r=11720

[Jakob Kummerow, 2012-06-05 17:28:48]

As discussed offline:
- the Windows compiler probably wants a cast for result_len
- you'll need to convert the test to a cctest in order to be able to catch the
expected OOM

[Yang, 2012-06-05 17:39:54]

On 2012/06/05 17:28:48, Jakob wrote:
> As discussed offline:
> - the Windows compiler probably wants a cast for result_len
> - you'll need to convert the test to a cctest in order to be able to catch the
> expected OOM

Issues addressed. Please take another look.

[Jakob Kummerow, 2012-06-05 17:41:48]

lgtm