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-rw-r--r--includes/module.inc2
1 files changed, 1 insertions, 1 deletions
diff --git a/includes/module.inc b/includes/module.inc
index 38deae940..651c2e404 100644
--- a/includes/module.inc
+++ b/includes/module.inc
@@ -11,7 +11,7 @@ function module_iterate($function, $argument = "") {
}
// invoke hook $hook of module $name with optional arguments:
-function module_invoke($name, $hook, $a1 = 0, $a2 = 0) {
+function module_invoke($name, $hook, $a1 = NULL, $a2 = NULL) {
$function = $name ."_". $hook;
if (function_exists($function)) {
return $function($a1, $a2);