src/logoutd.c: Use STRNCAT() instead of its pattern

Signed-off-by: Alejandro Colomar <alx@kernel.org>

src/logoutd.c

@@ -21,6 +21,7 @@
 #include "prototypes.h"
 #include "shadowlog.h"
 #include "sizeof.h"
+#include "string/strcpy/strncat.h"
 #include "string/strdup/strndupa.h"
 
 
@@ -205,7 +206,7 @@ main(int argc, char **argv)
 				tty_name[0] = '\0';
 			}
 
-			strncat(tty_name, ut->ut_line, NITEMS(ut->ut_line));
+			STRNCAT(tty_name, ut->ut_line);
 #ifndef O_NOCTTY
 #define O_NOCTTY 0
 #endif