Fix credential error in BindToSlice.

protogeni/lib/GeniSA.pm.in

 #!/usr/bin/perl -wT
 #
 # GENIPUBLIC-COPYRIGHT
-# Copyright (c) 2008-2010 University of Utah and the Flux Group.
+# Copyright (c) 2008-2011 University of Utah and the Flux Group.
 # All rights reserved.
 #
 package GeniSA;
@@ -706,7 +706,7 @@ sub BindToSlice($)
 	print STDERR "Could not find local authority object\n";
 	return GeniResponse->Create(GENIRESPONSE_ERROR);
     }
-    my $credential = CheckCredential($cred, $authority);
+    my $credential = CheckCredential($cred);
     return $credential
 	if (GeniResponse::IsResponse($credential));