fix ensure_loaded to reload if called from a different module.

fix error handling in dbase.c


git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@939 b08c6af1-5177-4d33-ba66-4b1c6b8b522a

C/tracer.c

@@ -115,6 +115,8 @@ low_level_trace(yap_low_level_port port, PredEntry *pred, CELL *args)
   /*  extern int gc_calls; */
 
   vsc_count++;
+  if (vsc_count < 340000LL)
+    return;
 #ifdef COMMENTED
   if (port != enter_pred ||
       !pred ||