comment fix migrating the catalog code to the new infrastructure Daniel

* xinclude.c: comment fix
* catalog.c include/libxml/xmlerror.h: migrating the catalog code
  to the new infrastructure
Daniel
diff --git a/xinclude.c b/xinclude.c
index 8a336dc..04d827f 100644
--- a/xinclude.c
+++ b/xinclude.c
@@ -96,7 +96,7 @@
 
 /************************************************************************
  *									*
- * 		Tree memory error handler				*
+ * 			XInclude error handler				*
  *									*
  ************************************************************************/