trigger bulb on the stillimage (press shutter full) DPC, not on the autofocus DPC as that is used already
trigger bulb on the stillimage (press shutter full) DPC, not on
the autofocus DPC as that is used already

fixes https://github.com/gphoto/libgphoto2/issues/159

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