Fixed memory leak when deleting library.

src/Battling/Library/BattleLibrary.cpp

@@ -8,6 +8,7 @@ CreatureLib::Battling::BattleLibrary::BattleLibrary(CreatureLib::Library::DataLi
 CreatureLib::Battling::BattleLibrary::~BattleLibrary() {
     delete _staticLib;
     delete _statCalculator;
+    delete _damageLibrary;
 }
 
 const CreatureLib::Library::LibrarySettings& CreatureLib::Battling::BattleLibrary::GetSettings() const {