use thy_header.ML earlier;

--- a/src/Pure/Isar/ROOT.ML	Thu Jul 19 23:18:48 2007 +0200
+++ b/src/Pure/Isar/ROOT.ML	Thu Jul 19 23:18:50 2007 +0200
@@ -23,6 +23,7 @@
 
 (*theory sources*)
 use "../Thy/ml_context.ML";
+use "../Thy/thy_header.ML";
 use "../Thy/thy_load.ML";
 use "../Thy/thy_info.ML";
 use "../Thy/html.ML";
@@ -67,7 +68,6 @@
 use "../Thy/thy_output.ML";
 
 (*theory syntax*)
-use "../Thy/thy_header.ML";
 use "session.ML";
 use "../old_goals.ML";
 use "outer_syntax.ML";