Fix time comparison. Mail#date returns DateTime not Time.

actionmailer/test/base_test.rb

@@ -100,7 +100,7 @@ def custom_block(include_html=false)
   end
 
   test "mail() with bcc, cc, content_type, charset, mime_version, reply_to and date" do
-    @time = Time.now
+    @time = Time.now.beginning_of_day.to_datetime
     email = BaseMailer.welcome(:bcc => 'bcc@test.lindsaar.net',
                                :cc  => 'cc@test.lindsaar.net',
                                :content_type => 'multipart/mixed',