Enforce port being a number

R=dpranke@chromium.org
BUG=
TEST=


Review URL: http://codereview.chromium.org/8223011

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@104780 0039d316-1c4b-4281-b951-d872f2087c98

trychange.py

@@ -612,7 +612,7 @@ def TryChange(argv,
                    help="Use HTTP to talk to the try server [default]")
   group.add_option("-H", "--host",
                    help="Host address")
-  group.add_option("-P", "--port",
+  group.add_option("-P", "--port", type="int",
                    help="HTTP port")
   group.add_option("--proxy",
                    help="HTTP proxy")