Import town cargo generation factor patch

Adjust whitespace

http://www.tt-forums.net/viewtopic.php?f=33&t=46399&start=200#p1086221

src/settings_type.h

@@ -485,6 +485,7 @@ struct EconomySettings {
 	bool   station_noise_level;              ///< build new airports when the town noise level is still within accepted limits
 	uint16 town_noise_population[3];         ///< population to base decision on noise evaluation (@see town_council_tolerance)
 	bool   allow_town_level_crossings;       ///< towns are allowed to build level crossings
+	int8   town_cargo_factor;                ///< power-of-two multiplier for town (passenger, mail) generation. May be negative.
 	bool   infrastructure_maintenance;       ///< enable monthly maintenance fee for owner infrastructure
 };