obstack: fix comment

* lib/obstack.c: Fix comment along the lines suggested
by Bruno Haible in:
https://lists.gnu.org/r/bug-gnulib/2025-05/msg00074.html

diff --git a/lib/obstack.c b/lib/obstack.c
index 2313437e3ade8e6e3c1444f211b04e7271a9eb98..d6d1510b092285195306d5aafd9db97aadd66be9 100644 (file)
--- a/lib/obstack.c
+++ b/lib/obstack.c
@@ -31,7 +31,7 @@
 
 /* If GCC, or if an oddball (testing?) host that #defines __alignof__,
    use the already-supplied __alignof__.  Otherwise, this must be Gnulib
-   (as glibc assumes GCC); defer to Gnulib's alignof_type.  */
+   (as glibc assumes GCC); defer to Gnulib's alignof.  */
 #if !defined __GNUC__ && !defined __alignof__
 # define __alignof__(type) alignof (type)
 #endif