[Seaside] Custom WAErrorHandler

[Francois Stephany]

>>> Uh oh, you found a bug [1]. You'll have to add a
>>>
>>> response stream reset
>>>
>>> and will probably have to add this method on GRCodecStream and
>>> delegate to the stream instance variable.
>>>
>>>   [1] http://code.google.com/p/seaside/issues/detail?id=676
>>
>> Cheers ! I'll test that, should I commit something somewhere ?
>
> No, we'll fix.

Ok, thanks !