made spass additional default prover

--- a/src/HOL/Tools/ATP_Manager/atp_manager.ML	Thu Oct 01 15:19:49 2009 +0200
+++ b/src/HOL/Tools/ATP_Manager/atp_manager.ML	Thu Oct 01 16:46:48 2009 +0200
@@ -41,7 +41,7 @@
 
 local
 
-val atps = Unsynchronized.ref "e remote_vampire";
+val atps = Unsynchronized.ref "e spass remote_vampire";
 val max_atps = Unsynchronized.ref 5;   (* ~1 means infinite number of atps *)
 val timeout = Unsynchronized.ref 60;
 val full_types = Unsynchronized.ref false;