JOHNE - Add a guard so that a particular Unix header will only get #included when G_OS_UNIX is defined
JOHNE - Add a guard so that a particular Unix header will only get #included when G_OS_UNIX is defined

johne53/MB3Glibmm,johne53/MB3Glibmm,johne53/MB3Glibmm,johne53/MB3Glibmm