Index: lib/filelib.php
===================================================================
RCS file: /cvsroot/moodle/moodle/lib/filelib.php,v
retrieving revision 1.179
diff -u -r1.179 filelib.php
--- lib/filelib.php	18 Feb 2010 18:15:56 -0000	1.179
+++ lib/filelib.php	3 Mar 2010 12:07:54 -0000
@@ -1274,15 +1274,19 @@
  * @param string $element Desired information (usually 'icon')
  * @param string $icon Icon file path.
  * @param boolean $all return all matching entries (defaults to false - last match)
+ * @param boolean $includedefault include document/unknown (defaults to true)
  * @return string Requested piece of information from array
  */
-function mimeinfo_from_icon($element, $icon, $all=false) {
+function mimeinfo_from_icon($element, $icon, $all=false, $includedefault=true) {
     $mimeinfo = get_mimetypes_array();
 
     if (preg_match("/\/(.*)/", $icon, $matches)) {
         $icon = $matches[1];
     }
-    $info = array($mimeinfo['xxx'][$element]); // Default
+    $info = array();
+    if ($includedefault) {
+        $info[] = $mimeinfo['xxx'][$element]; // Default
+    }
     foreach($mimeinfo as $values) {
         if($values['icon']==$icon) {
             if(isset($values[$element])) {