Revert "Project modernization (#630)"

This code was not tested and breaks in Release builds, reverting to restore
functionality of the nightly. All in-game menus do not work and generating
a world crashes.

This reverts commit a9be52c41a.

Minecraft.World/ReedTile.cpp

@@ -78,7 +78,7 @@ bool ReedTile::canSurvive(Level *level, int x, int y, int z)
 
 AABB *ReedTile::getAABB(Level *level, int x, int y, int z)
 {
-	return nullptr;
+	return NULL;
 }
 
 int ReedTile::getResource(int data, Random *random, int playerBonusLevel)