Fixed compilation with GCC 3.4.2

reactos/lib/kernel32

diff -u -r1.13 -r1.14
--- k32.h	5 Nov 2004 12:28:19 -0000	1.13
+++ k32.h	14 Dec 2004 22:15:52 -0000	1.14
@@ -3,6 +3,7 @@

 #define NTOS_MODE_USER
 #define __NO_CTYPE_INLINES
 #include <ntos.h>

+#include <ctype.h>

 #include <stdarg.h>
 #include <stdio.h>
 #include <limits.h>