only ovbrwrite the PEF header for the K100D.
only ovbrwrite the PEF header for the K100D.

see https://github.com/gphoto/gphoto2/issues/459

gphoto/libgphoto2,gphoto/libgphoto2,gphoto/libgphoto2,gphoto/libgphoto2,gphoto/libgphoto2,gphoto/libgphoto2