Merge pull request #1906 from ARMmbed/parent_update_fix

Fixed missing broadcast synch information loose with default zeroes.

Author: Juha Heiskanen

source/6LoWPAN/ws/ws_bootstrap.c

@@ -481,10 +481,9 @@ static void ws_bootstrap_primary_parent_set(struct protocol_interface_info_entry
 
     memcpy(&fhss_configuration, ns_fhss_ws_configuration_get(cur->ws_info->fhss_api), sizeof(fhss_ws_configuration_t));
 
-    ws_fhss_set_defaults(cur, &fhss_configuration);
-
     // Learning broadcast network configuration
     if (neighbor_info->ws_neighbor->broadcast_shedule_info_stored) {
+        ws_fhss_set_defaults(cur, &fhss_configuration);
         fhss_configuration.ws_bc_channel_function = neighbor_info->ws_neighbor->fhss_data.bc_timing_info.broadcast_channel_function;
         if (fhss_configuration.ws_bc_channel_function == WS_FIXED_CHANNEL) {
             cur->ws_info->hopping_schdule.bc_fixed_channel = neighbor_info->ws_neighbor->fhss_data.bc_timing_info.fixed_channel;