fix Linux build after cherry-pick from upstream

Author: q4a

src/xrGame/script_game_object4.cpp

@@ -18,10 +18,10 @@
 #include "sight_manager_space.h"
 #include "sight_control_action.h"
 #include "sight_manager.h"
-#include "inventoryBox.h"
+#include "InventoryBox.h"
 #include "ZoneCampfire.h"
-#include "physicobject.h"
-#include "artefact.h"
+#include "PhysicObject.h"
+#include "Artefact.h"
 #include "stalker_sound_data.h"
 
 class CWeapon;