fix function signature and silence compile warning

diff --git a/ext/date/php_date.c b/ext/date/php_date.c
index 7620b82c9a544dfd0a9cc82f0ed31237da96cf71..9e33e75f6f659249184b366f8c7c3ad436214765 100644 (file)
--- a/ext/date/php_date.c
+++ b/ext/date/php_date.c
@@ -1788,7 +1788,7 @@ static void date_period_it_current_data(zend_object_iterator *iter, zval ***data
 
 
 /* {{{ date_period_it_current_key */
-static int date_period_it_current_key(zend_object_iterator *iter, char **str_key, uint *str_key_len, ulong *int_key TSRMLS_DC)
+static int date_period_it_current_key(zend_object_iterator *iter, zstr *str_key, uint *str_key_len, ulong *int_key TSRMLS_DC)
 {
        date_period_it   *iterator = (date_period_it *)iter;
        *int_key = iterator->current_index;