Stray XWARN fix.

kcgixml.c

@@ -206,7 +206,8 @@ kxml_pushnullattrs(struct kxmlreq *r, size_t elem, ...)
 	enum kcgi_err	 er;
 
 	if (r->stackpos >= KXML_STACK_MAX) {
-		XWARNX("maximum json stack size exceeded");
+		kutil_warnx(NULL, NULL, 
+			"maximum xml stack size exceeded");
 		return KCGI_ENOMEM;
 	} else if (elem >= r->elemsz)
 		return KCGI_WRITER;