- SAX.c testDocbook.c DOCBparser.c: more work on the support

of external parsed entities, added --noent to testDocbook
- valid.c: Garry Pennington found an uninitialized variable
  access in xmlValidateElementContent()
Daniel

valid.c

@@ -3661,6 +3661,7 @@ xmlValidateElementContent(xmlValidCtxtPtr ctxt, xmlNodePtr child,
     /*
      * The first entry in the stack is reserved to the current state
      */
+    ctxt->nodeTab = NULL;
     ctxt->vstate = &ctxt->vstateTab[0];
     ctxt->vstateNr = 1;
     CONT = cont;