ospf6d, ripd, vtysh: Fix "no set metric" for ospf6 and RIP

Allow the user to actually turn off the set metric command
in ospf6d and rip.

Signed-off-by: Daniel Walton <dwalton@cumulusnetworks.com>
diff --git a/vtysh/extract.pl.in b/vtysh/extract.pl.in
index 480d114..0bbc2a7 100755
--- a/vtysh/extract.pl.in
+++ b/vtysh/extract.pl.in
@@ -181,7 +181,7 @@
     }
 }
 
-my $bad_cli_stomps = 89;
+my $bad_cli_stomps = 90;
 # Currently we have $bad_cli_stomps.  This was determined by
 # running this script and counting up the collisions from what
 # was returned.
@@ -221,7 +221,7 @@
 # Output install_element
 print <<EOF;
 void
-vtysh_init_cmd ()
+vtysh_init_cmd (void)
 {
 EOF