normalize_posix_path can't take root access into account yet.

[Kazuhiro Fujieda]

normalize_posix_path can't take root access into account yet.
The following patch can fix it.

ChangeLog:
Fri Apr 21 11:29:43 2000  Kazuhiro Fujieda <fujieda@jaist.ac.jp>
	* path.cc (normalize_posix_path): Previous change failed to take root
	access into account, too.

--- path.cc-1.12	Fri Apr 21 11:43:53 2000
+++ path.cc	Fri Apr 21 11:29:43 2000
@@ -620,7 +620,7 @@ normalize_posix_path (const char *cwd, c
 	}
     }
   if (dst > (dst_start + 1) && dst[-1] == '.' && SLASH_P (dst[-2]))
-    dst -= dst[2] ? 2 : 1;
+    dst -= (dst > dst_start + 2) ? 2 : 1;
   *dst = 0;
   debug_printf ("%s = normalize_posix_path (%s)", dst_start, src_start);
   return 0;

____
  | AIST      Kazuhiro Fujieda <fujieda@jaist.ac.jp>
  | HOKURIKU  School of Information Science
o_/ 1990      Japan Advanced Institute of Science and Technology