core dump on HTTPRequest_flush & HTTPRequest_free

Hi all,
	I've got core dumps on HTTPRequest_flush and HTTPRequest_free
functions in HTTPReq.c.

	It turns out that me->target was not properly set (not NULL
though!) so that me->target->isa points to unaccessable memory location.
Because nothing is NULL, it's hard to protect.

	Could anybody give a hand?

Thanks,
- Fengyun