timekpr-gui and kerberos user hang GUI fails to start if no normal users present

timekpr-gui and kerberos hang with GUI fails to start if no normal users present.

timekpr-gui.py check shadow password to list user but kerberos authentification doesn't use shadow so it's hang

My patch to make it work use pwd instead of spwd

compiled and working for debian 8

Thanks

--- timekpr-gui.py.orig 2015-06-22 23:28:30.490843849 +0400
+++ timekpr-gui.py 2015-06-22 23:28:35.478891820 +0400
@@ -7,7 +7,7 @@
 from os import remove, mkdir, geteuid, getenv
 from os.path import isdir, isfile, realpath, dirname
 from time import strftime, sleep
-from pwd import getpwnam
+from pwd import getpwnam,getpwall
 from spwd import getspall

 import pygtk
@@ -156,7 +156,8 @@
   self.wTree.signal_autoconnect(dic)

   #Using /etc/shadow spwd module
- for userinfo in getspall():
+ #for userinfo in getspall():
+ for userinfo in getpwall():
    if isnormal(userinfo[0]):
     self.userSelect.append_text(userinfo[0])
     self.userSelect.set_active(0)