[Bug c/52991] attribute packed broken on mingw32?

[ktietz at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52991

--- Comment #16 from Kai Tietz <ktietz at gcc dot gnu.org> ---
ms-bitfield is broken regarding pack-attribute and align-attribute.  Later is
the cause why suggested patch is just half of the story.