Core/IoC: Fix uninitialized timer

Fix uninitialized Docks timer in Isle Of Conquest .

Valgrind log:
 Conditional jump or move depends on uninitialised value(s)
  at : BattlegroundIC::HandleCapturedNodes(ICNodePoint*, bool) (BattlegroundIC.cpp:665)
  by : BattlegroundIC::PostUpdateImpl(unsigned int) (BattlegroundIC.cpp:228)
  by : Battleground::Update(unsigned int) (Battleground.cpp:300)
  by : BattlegroundMgr::Update(unsigned int) (BattlegroundMgr.cpp:93)
  by : World::Update(unsigned int) (World.cpp:2062)