xmllint: Fix --html --sax element callbacks

We need the non-namespace callbacks for HTML.

xmllint.c

@@ -1141,7 +1141,6 @@ endDocumentDebug(void *ctx)
     fprintf(stdout, "SAX.endDocument()\n");
 }
 
-#ifdef LIBXML_SAX1_ENABLED
 /**
  * startElementDebug:
  * @ctxt:  An XML parser context
@@ -1186,7 +1185,6 @@ endElementDebug(void *ctx, const xmlChar *name)
 	return;
     fprintf(stdout, "SAX.endElement(%s)\n", (char *) name);
 }
-#endif /* LIBXML_SAX1_ENABLED */
 
 /**
  * charactersDebug:
@@ -1536,8 +1534,8 @@ static const xmlSAXHandler debugSAX2Handler = {
     setDocumentLocatorDebug,
     startDocumentDebug,
     endDocumentDebug,
-    NULL,
-    NULL,
+    startElementDebug, /* for HTML */
+    endElementDebug,
     referenceDebug,
     charactersDebug,
     ignorableWhitespaceDebug,