[PATCH] kernelbase: Avoid NULL-pointer dereferences.

[Gen Otsuji]

Hi,
After some investigation,
I want to cancel this patch. this patch is harmful.
null pointer dereference error should be catched in __EXCEPT_PAGE_FAULT block.

Please see https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=246426#c26
As Alex mentioned above url, the catch block __EXCEPT_PAGE_FAULT
cannot catch PAGE_FAULT in wine on FreeBSD.
FreeBSD's trapno and Linux's trapno is different.

Regards

Gen