Make --send-mail more useful by not requiring -r

git_cl.py

Index: git_cl.py
diff --git a/git_cl.py b/git_cl.py
index aff809ed9bdcb4623b2e54167757802ce16132a8..c0d9c9403e38d9b2f4dd3f937df87e5f456b41b5 100755
--- a/git_cl.py
+++ b/git_cl.py
@@ -920,10 +920,6 @@ def CMDupload(parser, args):
   upload_args.extend(['--server', cl.GetRietveldServer()])
   if options.emulate_svn_auto_props:
     upload_args.append('--emulate_svn_auto_props')
-  if options.send_mail:
-    if not options.reviewers:
-      DieWithError("Must specify reviewers to send email.")
-    upload_args.append('--send_mail')
   if options.from_logs and not options.message:
     print 'Must set message for subject line if using desc_from_logs'
     return 1
@@ -951,6 +947,10 @@ def CMDupload(parser, args):
     upload_args.extend(['--description', change_desc.description])
     if change_desc.reviewers:
       upload_args.extend(['--reviewers', change_desc.reviewers])
+    if options.send_mail:
+      if not change_desc.reviewers:
+        DieWithError("Must specify reviewers to send email.")
+      upload_args.append('--send_mail')
     cc = ','.join(filter(None, (cl.GetCCList(), options.cc)))
     if cc:
       upload_args.extend(['--cc', cc])