Author: Szymon Janc
Author Date: 2018-04-20 10:45:05 UTC

adapter: Fix accessing NULL adv_manager

adv_manager might be NULL also if BR/EDR only mdoe is set in main.conf
or if btd_adv_manager_new failed so checking for LE in supported
settings is not enough. This also makes btd_adv_manager_refresh
consistent with other adv_manager API regarding passing NULL manager
as function parameter.