Correctly pass the issue number as "issue" parameter to Changelist ctor

Instead of as branchref. Because it's an issue. Not a branchref.

Also, add myself as owner.

BUG=none
R=maruel@chromium.org

Review URL: https://chromiumcodereview.appspot.com/19997004

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@213387 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/git_cl.py b/git_cl.py
index 15d19c0..60c41f4 100755
--- a/git_cl.py
+++ b/git_cl.py
@@ -1795,7 +1795,7 @@
   if issue_arg.isdigit():
     # Input is an issue id.  Figure out the URL.
     issue = int(issue_arg)
-    cl = Changelist(issue)
+    cl = Changelist(issue=issue)
     patchset = cl.GetMostRecentPatchset()
     patch_data = cl.GetPatchSetDiff(issue, patchset)
   else: