An unreasonable designing of ZDApp.c

The global variable "zgRejoinPollRate" is used by function "NLME_SetPollRate" when ZDO message "ZDO_NWK_DISC_CNF" received.But,when a EndDevice's associating is Failed or no parent is discovered,the polling will be no-use.

”is run in function "ZDApp_ProcessNetworkJoin".First,add a new global variable "bool  ZDApp_SetRejoinPoll" for "ZDAPP.c".

When mssage "ZDO_NWK_DISC_CNF",it can be done like this:

          if ( ZDO_Config_Node_Descriptor.CapabilityFlags & CAPINFO_RCVR_ON_IDLE )
          {
            // The receiver is on, turn network layer polling off.
            NLME_SetPollRate( 0 );
            NLME_SetQueuedPollRate( 0 );
            NLME_SetResponseRate( 0 );
          }
          else
          {
            if ( (ZG_SECURE_ENABLED) && (devStartMode == MODE_JOIN) )
            {
              ZDApp_SavedPollRate = zgPollRate;
              ZDApp_SetRejoinPoll = TRUE;
              //NLME_SetPollRate( zgRejoinPollRate );
            }
          }

Then,fix some code of "ZDApp_ProcessNetworkJoin" like this

      if ( ZG_SECURE_ENABLED && ( ZDApp_RestoreNwkKey() == false ) )
      {
        // wait for auth from trust center!!
        devState = DEV_END_DEVICE_UNAUTH;
        // Start the reset timer for MAX UNAUTH time
        ZDApp_ResetTimerStart( MAX_DEVICE_UNAUTH_TIMEOUT );//MAX_DEVICE_UNAUTH_TIMEOUT );
        if(ZDApp_SetRejoinPoll)
        {
          ZDApp_SetRejoinPoll = FALSE;
          NLME_SetPollRate( zgRejoinPollRate );
        }
      }