Fix for grub_assert_fail undefined on NetBSD and other platforms

[BVK Chaitanya]

Hi


Attached is the patch, which removes use of undefined grub_assert_fail
function for catching bad-type-cast errors, with a better version
__attribute__((error("msg"))) gcc extension.  With this extension, gcc
can give the exact location of the bad type cast at compile time.

Unfortunately, I couldn't test this on NetBSD, where old technique was
reported failing as GCC optimizations didn't happen.  Can Grégoire
Sutr or anybody else try this out on NetBSD and confirm?


thanks,
-- 
bvk.chaitanya

grub-assert-fail.patch.txt
Description: Text document