tests: Fix printf compiler warning for an error case.

* tests/gpg/t-keylist.c (main): Cast DIM to int.

Signed-off-by: Werner Koch <wk@gnupg.org>

tests/gpg/t-keylist.c

@@ -569,7 +569,7 @@ main (int argc, char **argv)
   if (keys[i].fpr)
     {
       fprintf (stderr, "Less keys (%d) returned than expected (%d)\n",
-	       i, DIM (keys) - 1);
+	       i, (int)(DIM (keys) - 1));
       exit (1);
     }