applied patch from Bertrand Fritsch to fix a bug in

* xmlschemas.c: applied patch from Bertrand Fritsch to fix a bug in
  xmlSchemaClearValidCtxt
Daniel
diff --git a/xmlschemas.c b/xmlschemas.c
index 859bdd8..e0d3b7a 100644
--- a/xmlschemas.c
+++ b/xmlschemas.c
@@ -27179,6 +27179,7 @@
 	}
 	xmlFree(vctxt->idcNodes);
 	vctxt->idcNodes = NULL;
+	vctxt->nbIdcNodes = 0;
     }
     /*
     * Note that we won't delete the XPath state pool here.