Including stdarg.h in 5eb9989 - why?

[Rostislav Svoboda]

Hi, in 5eb9989 Alan just included stdarg.h (see below) with comment:
    * lib-src/make-docfile.c: Include stdarg.h.

Can anybody explain me why? To me such a one-liner makes no sense.
I'm just curious what's the idea behind such a commit...

Thanx Bost


@@ -36,6 +36,7 @@ along with GNU Emacs.  If not, see
<http://www.gnu.org/licenses/>.  */

 #include <config.h>

+#include <stdarg.h>
 #include <stdbool.h>
 #include <stddef.h>
 #include <stdint.h>