Disable town noise limits in indifferent town tolerance mode

Instead of setting noise limit to 0

src/lang/english.txt

@@ -4004,6 +4004,7 @@ STR_TOWN_VIEW_TOWN_GROWS_EVERY                                  :{BLACK}Town gro
 STR_TOWN_VIEW_TOWN_GROWS_EVERY_FUNDED                           :{BLACK}Town grows every {ORANGE}{COMMA}{BLACK}{NBSP}day{P "" s} (funded)
 STR_TOWN_VIEW_TOWN_GROW_STOPPED                                 :{BLACK}Town is {RED}not{BLACK} growing
 STR_TOWN_VIEW_NOISE_IN_TOWN                                     :{BLACK}Noise limit in town: {ORANGE}{COMMA}{BLACK}  max: {ORANGE}{COMMA}
+STR_TOWN_VIEW_NOISE_IN_TOWN_NO_LIMIT                            :{BLACK}Noise limit in town: {ORANGE}{COMMA}
 STR_TOWN_VIEW_CENTER_TOOLTIP                                    :{BLACK}Centre the main view on town location. Ctrl+Click opens a new viewport on town location
 STR_TOWN_VIEW_LOCAL_AUTHORITY_BUTTON                            :{BLACK}Local authority
 STR_TOWN_VIEW_LOCAL_AUTHORITY_TOOLTIP                           :{BLACK}Show information on local authority

src/town.h

@@ -150,7 +150,9 @@ struct Town : TownPool::PoolItem<&_town_pool> {
 	 */
 	inline uint16 MaxTownNoise() const
 	{
-		if (this->cache.population == 0 || _settings_game.difficulty.town_council_tolerance == TOWN_COUNCIL_INDIFFERENT) return 0; // no population? no noise
+		if (_settings_game.difficulty.town_council_tolerance == TOWN_COUNCIL_INDIFFERENT) return UINT16_MAX;
+
+		if (this->cache.population == 0) return 0; // no population? no noise
 
 		/* 3 is added (the noise of the lowest airport), so the  user can at least build a small airfield. */
 		return (this->cache.population / _settings_game.economy.town_noise_population[_settings_game.difficulty.town_council_tolerance]) + 3;

src/town_gui.cpp

@@ -435,9 +435,10 @@ public:
 
 		/* only show the town noise, if the noise option is activated. */
 		if (_settings_game.economy.station_noise_level) {
+			uint16 max_noise = this->town->MaxTownNoise();
 			SetDParam(0, this->town->noise_reached);
-			SetDParam(1, this->town->MaxTownNoise());
-			DrawString(r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_LEFT, y += FONT_HEIGHT_NORMAL, STR_TOWN_VIEW_NOISE_IN_TOWN);
+			SetDParam(1, max_noise);
+			DrawString(r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_LEFT, y += FONT_HEIGHT_NORMAL, max_noise == UINT16_MAX ? STR_TOWN_VIEW_NOISE_IN_TOWN_NO_LIMIT : STR_TOWN_VIEW_NOISE_IN_TOWN);
 		}
 
 		if (!this->town->text.empty()) {