login: fix checktty test to compile with old glibc

Reported-by: "Gabor Z. Papp" <gzp@papp.hu>
Signed-off-by: Karel Zak <kzak@redhat.com>

diff --git a/login-utils/checktty.c b/login-utils/checktty.c
index 264cc6033cc1a9e9ccceb4ea811a030ed238a6a9..f849057169144e7461717ec76cf551ac208482ef 100644 (file)
--- a/login-utils/checktty.c
+++ b/login-utils/checktty.c
@@ -33,6 +33,7 @@
 #include "pathnames.h"
 #include "login.h"
 #include "strutils.h"
+#include "c.h"
 
 #ifndef TTY_MAJOR
 #define TTY_MAJOR 4