fix from Alexandros Vellis regarding missed SM_PATH statement

themes/darkness.php

@@ -7,7 +7,7 @@
    **/
 
 
-require_once('../functions/strings.php');
+require_once(SM_PATH . 'functions/strings.php');
 
    // Note:  The text distance is actually pre-squared
    // Background range is from 24-64, all three colors are the same