[Neko] Hash.get(null) segfaults

[Daniel Turing]

Hi,

the following results in a SIGSEGV in neko_buffer_to_string() on neko 1.8.1:

    var hash = new Hash<Any>();
    hash.get(null);

while, of course, get(null) is not a good idea to do, it surely
shouldnt segfault?

regards,
-dan

-- 
Neko : One VM to run them all
(http://nekovm.org)