codereview: don't check default paths when codereview disabled

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5622043

lib/codereview/codereview.py

@@ -2188,10 +2188,6 @@ def reposetup(ui, repo):
 		return
 	codereview_init = True
 
-	remote = ui.config("paths", "default", "")
-	if remote.find("://") < 0:
-		raise hg_util.Abort("codereview: default path '%s' is not a URL" % (remote,))
-
 	# Read repository-specific options from lib/codereview/codereview.cfg or codereview.cfg.
 	root = ''
 	try:
@@ -2220,6 +2216,10 @@ def reposetup(ui, repo):
 		codereview_disabled = 'codereview disabled: cannot open ' + repo_config_path
 		return
 
+	remote = ui.config("paths", "default", "")
+	if remote.find("://") < 0:
+		raise hg_util.Abort("codereview: default path '%s' is not a URL" % (remote,))
+
 	InstallMatch(ui, repo)
 	RietveldSetup(ui, repo)