gclient_scm: fix one more case where revision stores an int

Review URL: http://codereview.chromium.org/218016

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@27077 0039d316-1c4b-4281-b951-d872f2087c98

gclient_scm.py

@@ -163,7 +163,7 @@ class SVNWrapper(SCMWrapper):
       # Retrieve the current HEAD version because svn is slow at null updates.
       if not revision:
         from_info_live = CaptureSVNInfo(from_info['URL'], '.')
-        revision = from_info_live['Revision']
+        revision = str(from_info_live['Revision'])
         rev_str = ' at %s' % revision
 
     if from_info['URL'] != components[0]: