use list_head_init instead of open-coding it

While we cannot use LIST_HEAD since r63312, we can at
least use list_head_init to make our code more readable.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63314 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/io.c b/io.c
index 6a0d7114d2..56332fe929 100644
--- a/io.c
+++ b/io.c
@@ -4671,8 +4671,8 @@ io_close_fptr(VALUE io)
     VALUE write_io;
     rb_io_t *write_fptr;
     struct list_head busy;
-    busy.n.next = busy.n.prev = &busy.n;
 
+    list_head_init(&busy);
     write_io = GetWriteIO(io);
     if (io != write_io) {
         write_fptr = RFILE(write_io)->fptr;