keychain.diff

diff --git a/code/client/munkilib/keychain.py b/code/client/munkilib/keychain.py
index 5f743ba..50233b1 100644
--- a/code/client/munkilib/keychain.py
+++ b/code/client/munkilib/keychain.py
@@ -439,7 +439,7 @@ def client_certs_newer_than_keychain():
     client_cert_path = certdata['client_cert_path']
     client_key_path = certdata['client_key_path']
     keychain_path = get_keychain_path()
-    if not os.path.exists(client_cert_path):
+    if not client_cert_path or not os.path.exists(client_cert_path):
         return False
     if not os.path.exists(keychain_path):
         return False

MSU.log

Managed Software Update Tool
Copyright 2010-2014 The Munki Project
http://code.google.com/p/munki

Starting...
ERROR: Unexpected error in updatecheck:
Traceback (most recent call last):
  File "./managedsoftwareupdate", line 991, in <module>
    main()
  File "./managedsoftwareupdate", line 703, in main
    updatecheckresult = updatecheck.check(client_id=options.id)
  File "/Users/tsutton/git/github/munki/code/client/munkilib/updatecheck.py", line 2858, in check
    keychain_obj = keychain.MunkiKeychain()
  File "/Users/tsutton/git/github/munki/code/client/munkilib/keychain.py", line 525, in __init__
    if client_certs_newer_than_keychain():
  File "/Users/tsutton/git/github/munki/code/client/munkilib/keychain.py", line 442, in client_certs_newer_than_keychain
    if not os.path.exists(client_cert_path):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/genericpath.py", line 18, in exists
    os.stat(path)
TypeError: coercing to Unicode: need string or buffer, NoneType found