put `const' back, now that the .m4 test works

diff --git a/lib/dirfd.c b/lib/dirfd.c
index 77ada78de5340eeb060cb267ab025e6f31ac787c..e234063534a5ab6309db70a0c10a391bd86848b5 100644 (file)
--- a/lib/dirfd.c
+++ b/lib/dirfd.c
@@ -24,7 +24,7 @@
 #include "dirfd.h"
 
 int
-dirfd (DIR *dir_p)
+dirfd (DIR const *dir_p)
 {
   return DIR_TO_FD;
 }