Fix git_cl_hooks brokenness.

git_cl_hooks.py

Index: git_cl_hooks.py
===================================================================
--- git_cl_hooks.py	(revision 61882)
+++ git_cl_hooks.py	(working copy)
@@ -1,4 +1,4 @@
-# Copyright (c) 2009 The Chromium Authors. All rights reserved.
+# Copyright (c) 2010 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
@@ -25,11 +25,11 @@
                           cwd=cwd,
                           stdout=subprocess.PIPE).communicate()[0].strip()
 
-def BackquoteAsInteger(cmd, cwd=None):
-  """Like Backquote, but returns either an int or None."""
+def ConvertToInteger(input):
+  """Convert a string to integer, but returns either an int or None."""
   try:
-    return int(Backquote(cmd, cwd))
-  except ValueError:
+    return int(input)
+  except TypeError, ValueError:
     return None
 
 
@@ -50,8 +50,8 @@
     name = Backquote(['git', 'rev-parse', 'HEAD'])
     files = scm.GIT.CaptureStatus([root], upstream_branch)
     cl = git_cl.Changelist()
-    issue = cl.GetIssue()
-    patchset = cl.GetPatchset()
+    issue = ConvertToInteger(cl.GetIssue())
+    patchset = ConvertToInteger(cl.GetPatchset())
     if issue:
       description = cl.GetDescription()
     else: