nih_dir_walk() uses stat instead of lstat - makes deletion of files from directories very hard

[Surbhi Palande]

nih_dir_walk_scan () is a static function in file.c in the libnih package. This function is somewhat more suitable for deleting the files. The non static function which calls nih_dir_walk_scan is nih_dir_walk (). AFAIU, this is not very suitable for deleting the contents of a directory, but rather for reading them. The implementation of nih_dir_walk() particularly uses "stat" rather than "lstat" and so deletion of links is difficult using this function.