commit
2fe403e7452bd6e1e8232445cf5434ce8f1af973 broke "git-svn info ."
due to replacing '.' with '' in canonicalize_path for the top directory,
while find_file_type_and_diff_status was not corrected.
Bug reports:
http://thread.gmane.org/gmane.comp.version-control.git/87822/
http://bugs.debian.org/490400
Signed-off-by: Dmitry Potapov <dpotapov@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>