don't display default value for variadic

Author: remicollet

ext/reflection/php_reflection.c

@@ -674,7 +674,7 @@ static void _parameter_string(smart_str *str, zend_function *fptr, struct _zend_
 	smart_str_append_printf(str, "$%s", has_internal_arg_info(fptr)
 		? ((zend_internal_arg_info*)arg_info)->name : ZSTR_VAL(arg_info->name));
 
-	if (!required) {
+	if (!required && !ZEND_ARG_IS_VARIADIC(arg_info)) {
 		if (fptr->type == ZEND_INTERNAL_FUNCTION) {
 			smart_str_appends(str, " = ");
 			/* TODO: We don't have a way to fetch the default value for an internal function

ext/reflection/tests/ReflectionClass_toString_001.phpt

@@ -261,7 +261,7 @@ Class [ <internal:Reflection> class ReflectionClass implements Reflector, String
     Method [ <internal:Reflection> public method newInstance ] {
 
       - Parameters [1] {
-        Parameter #0 [ <optional> mixed ...$args = <default> ]
+        Parameter #0 [ <optional> mixed ...$args ]
       }
     }