Interface referencing should probably check for a previous type
declaration, but Wine IDLs currently have many places where this is
broken.

This is for instance the case when a coclass use the inner interface
statement to declare an interface without any previous declaration.

And in mimeole.idl, coclass are being declared with the same name as
their interface, to generate the corresponding CLSID.
Signed-off-by: Rémi Bernon <rbernon@codeweavers.com>
Signed-off-by: Jacek Caban <jacek@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>