Add a missing GC root

From-SVN: r29236

gcc/ChangeLog

+Thu Sep  9 17:23:19 1999  Bernd Schmidt  <bernds@cygnus.co.uk>
+
+	* except.c (call_get_eh_context): Add root when allocating static
+	tree variable.
+
 Thu Sep  9 15:24:59 BST 1999  Richard Earnshaw <rearnsha@arm.com>
 
 	* arm.c: Include "ggc.h".

gcc/except.c

@@ -1101,6 +1101,8 @@ call_get_eh_context ()
       make_decl_rtl (fn, NULL_PTR, 1);
       assemble_external (fn);
       pop_obstacks ();
+
+      ggc_add_tree_root (&fn, 1);
     }
 
   expr = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (fn)), fn);