added init failing if --admin-password is empty

Author: miguelaraujo

plugins/admin/admin-plugin.c

@@ -574,6 +574,11 @@ static int network_mysqld_admin_plugin_apply_config(chassis *chas, chassis_plugi
 G_STRLOC);
 return -1;
 }
+if (!g_strcmp0(config->admin_password, "")) {
+g_critical("%s: --admin-password cannot be empty",
+G_STRLOC);
+return -1;
+}
 if (!config->lua_script) {
 g_critical("%s: --admin-lua-script needs to be set, <install-dir>/lib/mysql-proxy/lua/admin.lua may be a good value",
 G_STRLOC);