Fix libxml namespace wildcard comparison

third_party/libxml/src/xmlschemas.c

 /*
  * schemas.c : implementation of the XML Schema handling and
  *             schema validity checking
  *
  * See Copyright for the status of this software.
  *
  * Daniel Veillard <veillard@redhat.com>
  */
 
 /*
@@ skipping 13928 matching lines @@
     * 1 super must be any.
     */
     if (super->any)
         return (0);
     /*
     * 2.1 sub must be a pair of not and a namespace name or �absent�.
     * 2.2 super must be a pair of not and the same value.
     */
     if ((sub->negNsSet != NULL) &&
         (super->negNsSet != NULL) &&
-        (sub->negNsSet->value == sub->negNsSet->value))
+        (sub->negNsSet->value == super->negNsSet->value))
         return (0);
     /*
     * 3.1 sub must be a set whose members are either namespace names or �absent�.
     */
     if (sub->nsSet != NULL) {
         /*
         * 3.2.1 super must be the same set or a superset thereof.
         */
         if (super->nsSet != NULL) {
             xmlSchemaWildcardNsPtr cur, curB;
@@ skipping 14797 matching lines @@
 xmlSchemaValidCtxtGetParserCtxt(xmlSchemaValidCtxtPtr ctxt)
 {
     if (ctxt == NULL)
         return(NULL);
     return (ctxt->parserCtxt);
 }
 
 #define bottom_xmlschemas
 #include "elfgcchack.h"
 #endif /* LIBXML_SCHEMAS_ENABLED */