MDL-1883 - /course/scales.php very slow. "Backported" the fix by Petr from 1.9 to 1.8. Not a direct merge as the code has been refactored.

mod/journal/lib.php

@@ -307,6 +307,16 @@ function journal_scale_used ($journalid,$scaleid) {
     return $return;
 }
 
+/**
+ * Returns true if the scale is in use in the system.
+ *
+ * @param $scaleid int The scale to be counted.
+ * @return boolean
+ */
+function journal_scale_used_anywhere($scaleid) {
+    return record_exists("journal","assessed","-$scaleid");
+}
+
 // SQL FUNCTIONS ///////////////////////////////////////////////////////////////////
 
 function journal_get_users_done($journal) {