a new and hopefully much better implementation of atts.

git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@1392 b08c6af1-5177-4d33-ba66-4b1c6b8b522a

C/tracer.c

@@ -120,6 +120,8 @@ low_level_trace(yap_low_level_port port, PredEntry *pred, CELL *args)
   /*  extern int gc_calls; */
 
   vsc_count++;
+  if (vsc_count < 487000) 
+  return;
 #ifdef COMMENTED
   //  if (vsc_count == 218280)
   //    vsc_xstop = 1;