Reset layout error counters after town construction

src/citymania/cm_event.hpp

@@ -22,6 +22,10 @@ namespace event {
 
 struct NewMonth {};
 
+struct TownBiilt {
+    Town *town;
+};
+
 struct TownGrowthSucceeded {
     Town *town;
     TileIndex tile;

src/citymania/cm_game.cpp

@@ -27,6 +27,11 @@ Game::Game() {
         this->towns_growth_tiles_last_month = this->towns_growth_tiles;
         this->towns_growth_tiles.clear();
     });
+    this->events.listen<event::TownBuilt>(event::Slot::GAME, [this] (const event::TownBuilt &event) {
+        t->cm.hs_total = t->cm.hs_last_month = t->cm.hs_total_prev = 0;
+        t->cm.cs_total = t->cm.cs_last_month = t->cm.cs_total_prev = 0;
+        t->cm.hr_total = t->cm.hr_last_month = t->cm.hr_total_prev = 0;
+    });
 
     this->events.listen<event::TownGrowthSucceeded>(event::Slot::GAME, [this] (const event::TownGrowthSucceeded &event) {
         if (event.town->cache.num_houses <= event.prev_houses) {

src/town_cmd.cpp

@@ -1763,6 +1763,7 @@ static void DoCreateTown(Town *t, TileIndex tile, uint32 townnameparts, TownSize
 	UpdateTownGrowthRate(t);
 	UpdateTownMaxPass(t);
 	UpdateAirportsNoise();
+	citymania::Emit(citymania::event::TownBuilt{t});
 }
 
 /**