tuned load order -- minimizes modules before Secure;

--- a/src/Pure/General/ROOT.ML	Tue Aug 28 11:25:29 2007 +0200
+++ b/src/Pure/General/ROOT.ML	Tue Aug 28 11:25:30 2007 +0200
@@ -5,19 +5,20 @@
 *)
 
 use "print_mode.ML";
-use "stack.ML";
-use "ord_list.ML";
 use "alist.ML";
 use "table.ML";
-use "graph.ML";
-use "balanced_tree.ML";
 use "output.ML";
 use "markup.ML";
-use "heap.ML";
 use "scan.ML";
 use "source.ML";
 use "symbol.ML";
 use "secure.ML";
+
+use "stack.ML";
+use "heap.ML";
+use "ord_list.ML";
+use "balanced_tree.ML";
+use "graph.ML";
 use "name_space.ML";
 use "seq.ML";
 use "susp.ML";