config: start wizard only when the main config file does not exist

src/config.c

@@ -1627,7 +1627,6 @@ config_boot ( const char *path, gid_t gid, uid_t uid )
   memset(&config, 0, sizeof(config));
   config.idnode.in_class = &config_class;
   config.ui_quicktips = 1;
-  config.wizard = strdup("hello");
   config.info_area = strdup("login,storage,time");
   config.cookie_expires = 7;
   config.dscp = -1;
@@ -1678,6 +1677,7 @@ config_boot ( const char *path, gid_t gid, uid_t uid )
   config2 = hts_settings_load("config");
   if (!config2) {
     tvhlog(LOG_DEBUG, "config", "no configuration, loading defaults");
+    config.wizard = strdup("hello");
     config_newcfg = 1;
   } else {
     f = htsmsg_field_find(config2, "language");