Prefer rb_check_arity when 0 or 1 arguments

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66205 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 2 insertions, 3 deletions

diff --git a/dir.c b/dir.c
index 6ed53afa9f..2f38e35976 100644
--- a/dir.c
+++ b/dir.c
@@ -1080,9 +1080,8 @@ dir_s_chdir(int argc, VALUE *argv, VALUE obj)
 {
     VALUE path = Qnil;
 
-    if (rb_scan_args(argc, argv, "01", &path) == 1) {
-	FilePathValue(path);
-	path = rb_str_encode_ospath(path);
+    if (rb_check_arity(argc, 0, 1) == 1) {
+        path = rb_str_encode_ospath(rb_get_path(argv[0]));
     }
     else {
 	const char *dist = getenv("HOME");