Fix builds without on-demand support.

Author: michaelrsweet

scheduler/conf.c

@@ -1048,7 +1048,11 @@ cupsdReadConfiguration(void)
   * as an error and exit!
   */
 
+#ifdef HAVE_ONDEMAND
   if (cupsArrayCount(Listeners) == 0 && !OnDemand)
+#else
+  if (cupsArrayCount(Listeners) == 0)
+#endif // HAVE_ONDEMAND
   {
    /*
     * No listeners!