added --schema option to run WXS schema validation tried to improve error

* xmllint.c: added --schema option to run WXS schema validation
* xmlschemas.c xmlschemastypes.c include/libxml/schemasInternals.h:
  tried to improve error reporting in the Schema code, some cleanup
  too.
Daniel

1 files changed, 2 insertions, 0 deletions

diff --git a/include/libxml/schemasInternals.h b/include/libxml/schemasInternals.h
index fb1f7eeb..54e8fb37 100644
--- a/include/libxml/schemasInternals.h
+++ b/include/libxml/schemasInternals.h
@@ -116,6 +116,7 @@ struct _xmlSchemaAttribute {
     int occurs;
     xmlChar *defValue;
     xmlSchemaTypePtr subtypes;
+    xmlNodePtr node;
 };
 
 /**
@@ -136,6 +137,7 @@ struct _xmlSchemaAttributeGroup {
     xmlSchemaAnnotPtr annot;
 
     xmlSchemaAttributePtr attributes;
+    xmlNodePtr node;
 };