Added prerequisite checks

modules/util/module.php

@@ -28,5 +28,8 @@ $module_version = "2.0";
 $db_version = 0;
 $module_required = TRUE;
 $module_menus = array( array( 'subpage' => '', 'name'=>'Utilities', 'group'=>'user' ) );
+$module_prereqs = array(
+	array( "name" => "PHP BCMath Extension", "type" => "f", "value" => "bcadd" ),
+);
 ?>