[Minor] Allow aircraft to continuously kill targets in planning mode (#1729)

In vanilla game, aircraft will always return to airport even it still
has remain ammo and planning after target has been destroyed.
For now, the aircraft will continue attack next planning target if it
still has ammo.

Author: NetsuNegi

src/Ext/Aircraft/Hooks.cpp

@@ -771,6 +771,15 @@ DEFINE_HOOK(0x4C72F2, EventClass_Execute_AircraftAreaGuard_Untether, 0x6)
 	return 0;
 }
 
+DEFINE_HOOK(0x418CF3, AircraftClass_Mission_Attack_PlanningFix, 0x5)
+{
+	enum { SkipIdle = 0x418D00 };
+
+	GET(AircraftClass*, pThis, ESI);
+
+	return pThis->Ammo <= 0 || !pThis->TryNextPlanningTokenNode() ? 0 : SkipIdle;
+}
+
 #pragma endregion
 
 static __forceinline bool CheckSpyPlaneCameraCount(AircraftClass* pThis)