[PATCH] widl: Make MIDL_DEFINE_GUID more compatible with midl.

[Jacek Caban]

Signed-off-by: Jacek Caban <jacek(a)codeweavers.com>
---

selectany is useful on platforms that support it. Also _i.c files seem
prepared to be included by #include. Windows SDK even distributes some
of them along with regular headers. When such files are included from
C++ (like in case of Firefox), extern "C" is needed.

 tools/widl/widl.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)