cleanup to canon_int_directory_operations() - use GP_DEBUG, check results more carefully and report failure with gp_camera_set_error().
cleanup to canon_int_directory_operations() - use GP_DEBUG, check results
more carefully and report failure with gp_camera_set_error().


git-svn-id: 40dd595c6684d839db675001a64203a1457e7319@3673 67ed7778-7388-44ab-90cf-0a291f65f57c

gphoto/libgphoto2.OLDMIGRATION,gphoto/libgphoto2.OLDMIGRATION,gphoto/libgphoto2.OLDMIGRATION,gphoto/libgphoto2.OLDMIGRATION