fix potential NRE in IrcClient._Event_RPL_BOUNCE()
fix potential NRE in IrcClient._Event_RPL_BOUNCE()

meebey/SmartIrc4net,meebey/SmartIrc4net,RavuAlHemio/SmartIrc4net,gmt2001/SmartIrc4net,gmt2001/SmartIrc4net,RavuAlHemio/SmartIrc4net