fixing HasValue for namespace as raised by Denys Duchier Daniel

* xmlreader.c: fixing HasValue for namespace as raised by
  Denys Duchier
Daniel
diff --git a/xmlreader.c b/xmlreader.c
index d696bd8..64da1bb 100644
--- a/xmlreader.c
+++ b/xmlreader.c
@@ -2034,6 +2034,7 @@
         case XML_CDATA_SECTION_NODE:
         case XML_PI_NODE:
         case XML_COMMENT_NODE:
+        case XML_NAMESPACE_DECL:
 	    return(1);
 	default:
 	    break;