added utils_beep()

git-svn-id: https://geany.svn.sourceforge.net/svnroot/geany/trunk@173 ea778897-0a13-0410-b9d1-a72fbfd435f5

src/utils.h

 /*
  *      utils.h - this file is part of Geany, a fast and lightweight IDE
  *
- *      Copyright 2005 Enrico Troeger <enrico.troeger@uvena.de>
+ *      Copyright 2006 Enrico Troeger <enrico.troeger@uvena.de>
  *
  *      This program is free software; you can redistribute it and/or modify
  *      it under the terms of the GNU General Public License as published by
@@ -201,4 +201,6 @@ void utils_treeviews_showhide(void);
 
 gchar *utils_get_current_file_dir();
 
+void utils_beep(void);
+
 #endif