Even when NLS is off, need LC_MESSAGES variable available,

so include <locale.h>.   Found this on axa.slu.edu.

cuardach.c

@@ -10,6 +10,7 @@
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>		/* atoi, strtol */
+#include <locale.h>
 #include "gettext.h"
 #else
 /* trouble! */

ponc.in.y

@@ -1,6 +1,7 @@
 %{
 /* Grammar for the three *.in data files */
 #include <stdio.h>
+#include <locale.h>
 #include "gettext.h"
 int lineno = 1;
 int errors = 0;