Jonas Ådahl 15e3b6f136 gmessages: Add g_warning_once()
In many places the pattern

    static gboolean warned_once = FALSE;
    if (!warned_once)
      {
        g_warning ("This and that");
        warned_once = TRUE;
      }

is used to not spam the same warning message over and over again. Add a
helper in glib for this, allowing the above statement to be changed to

    g_warning_once ("This and that");
2019-10-09 16:39:31 +02:00
..
2019-10-09 16:39:31 +02:00