Fix bug #345 reported by David Bolen <db3l@fitlinxx.com>:

getatime() returned the mtime instead of the atime.
Similar to an old bug in posixpath.py.

Lib/ntpath.py

@@ -183,7 +183,7 @@ def getmtime(filename):
 def getatime(filename):
     """Return the last access time of a file, reported by os.stat()"""
     st = os.stat(filename)
-    return st[stat.ST_MTIME]
+    return st[stat.ST_ATIME]
 
 
 # Is a path a symbolic link?