cosmetic cleanup started integrating a DTD validation layer based on the

* hash.c: cosmetic cleanup
* valid.c include/libxml/tree.h include/libxml/valid.h: started
  integrating a DTD validation layer based on the regexps
Daniel
diff --git a/hash.c b/hash.c
index 28bf014..dbf634e 100644
--- a/hash.c
+++ b/hash.c
@@ -552,8 +552,8 @@
 
 static void 
 stubHashScannerFull (void *payload, void *data, const xmlChar *name, 
-    const xmlChar *name2, const xmlChar *name3
-) {
+                     const xmlChar *name2 ATTRIBUTE_UNUSED,
+		     const xmlChar *name3 ATTRIBUTE_UNUSED) {
     stubData *stubdata = (stubData *) data;
     stubdata->hashscanner (payload, stubdata->data, (xmlChar *) name);
 }