Codechange: Allocate houses dynamically instead of from a fixed array.

This uses vectors for HouseSpecs and global/town building counts.

src/misc.cpp

@@ -148,7 +148,6 @@ void InitializeGame(uint size_x, uint size_y, bool reset_date, bool reset_settin
 	InitializeTrees();
 	InitializeIndustries();
 	InitializeObjects();
-	InitializeBuildingCounts();
 
 	InitializeNPF();