Fixes invalid pointers to a battle dangling when a battle is removed.

Signed-off-by: Deukhoofd <Deukhoofd@gmail.com>

src/Battling/Models/Creature.cpp

@@ -100,8 +100,10 @@ namespace CreatureLib::Battling {
         _side = side.GetRaw();
         this->ResetActiveScripts();
     }
-
-    // region Stat APIs
+    void Creature::ClearBattleData() noexcept {
+        _battle = nullptr;
+        _side = nullptr;
+    }
 
     bool Creature::ChangeStatBoost(Library::Statistic stat, int8_t diffAmount) {
         bool changed = false;
@@ -133,8 +135,6 @@ namespace CreatureLib::Battling {
         this->_boostedStats.SetStat(stat, s);
     }
 
-    // endregion
-
     const ArbUt::OptionalBorrowedPtr<Battle>& Creature::GetBattle() const { return _battle; }
 
     const ArbUt::OptionalBorrowedPtr<BattleSide>& Creature::GetBattleSide() const { return _side; }