added word print for times < 1

public/include/smarty/libs/plugins/modifier.seconds_to_words.php

@@ -9,6 +9,7 @@
 function smarty_modifier_seconds_to_words($seconds) {
   if ($seconds < 0) throw new Exception("Can't do negative numbers!");
   if ($seconds == 0) return "zero seconds";
+  if ($seconds < 1) return "less than a second";
 
   $hours = intval($seconds/pow(60,2));
   $minutes = intval($seconds/60)%60;