- srd_log_callback_set(prev_srd_log_cb, prev_srd_log_cb_data);
- prev_srd_log_cb = NULL;
- prev_srd_log_cb_data = NULL;
+ if (prev_srd_log_cb)
+ srd_log_callback_set(prev_srd_log_cb, prev_srd_log_cb_data);
+ prev_srd_log_cb = nullptr;
+ prev_srd_log_cb_data = nullptr;