Use bool instead of int in session struct

Author: Girgias

ext/session/php_session.h

@@ -174,8 +174,8 @@ typedef struct _php_ps_globals {
 			zval ps_update_timestamp;
 		} name;
 	} mod_user_names;
-	int mod_user_implemented;
-	int mod_user_is_open;
+	bool mod_user_implemented;
+	bool mod_user_is_open;
 	zend_string *mod_user_class_name;
 	const struct ps_serializer_struct *serializer;
 	zval http_session_vars;