FHSS parent synch fix.

Parent broadcast set never stop old shedule which cause that nodes start
advertisment Broadast shedule wrongly.

source/Service_Libs/fhss/fhss_ws.c

@@ -664,10 +664,14 @@ int fhss_ws_set_parent(fhss_structure_t *fhss_structure, const uint8_t eui64[8],
         return -1;
     }
     platform_enter_critical();
+    fhss_structure->platform_functions.fhss_timer_stop(fhss_broadcast_handler, fhss_structure->fhss_api);
     uint32_t time_from_reception_ms = (fhss_structure->callbacks.read_timestamp(fhss_structure->fhss_api) - bc_timing_info->bt_rx_timestamp)/1000;
     uint32_t true_bc_interval_offset = (bc_timing_info->broadcast_interval_offset + time_from_reception_ms) % bc_timing_info->broadcast_interval;
     uint32_t timeout = ((bc_timing_info->broadcast_interval-true_bc_interval_offset)*1000);
-    fhss_structure->ws->is_on_bc_channel = false;
+
+    if (fhss_structure->ws->is_on_bc_channel) {
+        timeout -= ((bc_timing_info->broadcast_interval - bc_timing_info->broadcast_dwell_interval) *1000);
+    }
     fhss_start_timer(fhss_structure, timeout, fhss_broadcast_handler);
     uint16_t slots_since_reception = (bc_timing_info->broadcast_interval_offset + time_from_reception_ms) / bc_timing_info->broadcast_interval;
     // TODO: Calculate drift error