One liner fix.

Review URL: http://codereview.chromium.org/502075

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@34984 0039d316-1c4b-4281-b951-d872f2087c98

scm.py

@@ -94,7 +94,7 @@ class SVN(object):
     """
     c = [SVN.COMMAND]
     c.extend(args)
-
+    # TODO(maruel): This is very gclient-specific.
     gclient_utils.SubprocessCall(c, in_directory)
 
   @staticmethod

trychange.py

@@ -567,4 +567,4 @@ def TryChange(argv,
 
 
 if __name__ == "__main__":
-  sys.exit(TryChange(None, None, False))
+  sys.exit(TryChange(None, [], False))