===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/sudo/Attic/aclocal.m4,v
retrieving revision 1.6
retrieving revision 1.7
diff -u -r1.6 -r1.7
--- src/usr.bin/sudo/Attic/aclocal.m4	2007/07/26 16:10:15	1.6
+++ src/usr.bin/sudo/Attic/aclocal.m4	2007/08/15 14:22:39	1.7
@@ -229,7 +229,7 @@
 dnl
 AC_DEFUN([SUDO_FUNC_ISBLANK],
   [AC_CACHE_CHECK([for isblank], sudo_cv_func_isblank,
-    [AC_TRY_LINK([#include <ctype.h>], [(void)isblank(1);],
+    [AC_TRY_LINK([#include <ctype.h>], [return (isblank('a'));],
     sudo_cv_func_isblank=yes, sudo_cv_func_isblank=no)])
 ] [
   if test "$sudo_cv_func_isblank" = "yes"; then