Mass replace NULL --> nullptr

(Except one instance was instead replaced with nil)

src/scenedit/scen.main.cpp

@@ -27,7 +27,7 @@
 bool  All_Done = false;
 sf::Event event;
 sf::RenderWindow mainPtr;
-cTown* town = NULL;
+cTown* town = nullptr;
 bool diff_depth_ok = false,mouse_button_held = false,editing_town = false;
 short cur_viewing_mode = 0;
 short cen_x, cen_y;
@@ -124,7 +124,7 @@ void Initialize(void) {
 	//	and date into the seed.  Since it is always incrementing the starting seed
 	//	will always be different.  Don’t for each call of Random, or the sequence
 	//	will no longer be random.  Only needed once, here in the init.
-	srand(time(NULL));
+	srand(time(nullptr));
 	
 	//	Make a new window for drawing in, and it must be a color window.
 	//	The window is full screen size, made smaller to make it more visible.