glib: Fix mem leak in poppler_document_new_from_fd
Plug the mem leak by making a simple OwningFileStream (local to this file in glib/, not public in poppler/) that does that. That seemed the simplest way to fix this.
Plug the mem leak by making a simple OwningFileStream (local to this file in glib/, not public in poppler/) that does that. That seemed the simplest way to fix this.