[Evolution] Evolution IDL files #including .h?

[Jason Tackaberry <tack linux com>]

I noticed that 3 of Evolution's IDL files are #including Bonobo.h and
not Bonobo.idl (Evolution-Session.idl, Evolution-ShellComponent.idl, and
Evolution-Storage.idl).  All the others include Bonobo.idl.  Is this
intentional?  If so, what's the reason for it?  It's causing problems
for me with another project and if it's not a mistake I'll need to
figure out a work-around.

Thanks,
Jason.l