* libgphoto2/camera.c (gp_camera_list_folders), (gp_camera_list_files): Return the result instead of GP_OK if anything goes wrong
* libgphoto2/filesys.c: Check if path to folder is absolute. If not,
return GP_ERROR_PATH_NOT_ABSOLUTE.
* libgphoto2/result.c:
* include/gphoto2-result.h: GP_ERROR_PATH_NOT_ABSOLUTE: New error.
git-svn-id: https://svn.code.sf.net/p/gphoto/code/trunk/libgphoto2@2221 67ed7778-7388-44ab-90cf-0a291f65f57c