Codechange: Use null pointer literal instead of the NULL macro

1 files changed, 3 insertions, 3 deletions

diff --git a/src/airport_gui.cpp b/src/airport_gui.cpp
index d170b0cbb..8e436f1cb 100644
--- a/src/airport_gui.cpp
+++ b/src/airport_gui.cpp
@@ -161,7 +161,7 @@ static EventState AirportToolbarGlobalHotkeys(int hotkey)
 {
 	if (_game_mode != GM_NORMAL || !CanBuildVehicleInfrastructure(VEH_AIRCRAFT)) return ES_NOT_HANDLED;
 	Window *w = ShowBuildAirToolbar();
-	if (w == NULL) return ES_NOT_HANDLED;
+	if (w == nullptr) return ES_NOT_HANDLED;
 	return w->OnHotkey(hotkey);
 }
 
@@ -198,11 +198,11 @@ static WindowDesc _air_toolbar_desc(
  *
  * If the terraform toolbar is linked to the toolbar, that window is also opened.
  *
- * @return newly opened airport toolbar, or NULL if the toolbar could not be opened.
+ * @return newly opened airport toolbar, or nullptr if the toolbar could not be opened.
  */
 Window *ShowBuildAirToolbar()
 {
-	if (!Company::IsValidID(_local_company)) return NULL;
+	if (!Company::IsValidID(_local_company)) return nullptr;
 
 	DeleteWindowByClass(WC_BUILD_TOOLBAR);
 	return AllocateWindowDescFront<BuildAirToolbarWindow>(&_air_toolbar_desc, TRANSPORT_AIR);