Add cheat to fix station ratings at 100%

src/cheat_type.h

@@ -40,6 +40,7 @@ struct Cheats {
 struct ExtraCheats {
 	Cheat inflation_cost;   ///< inflation cost factor
 	Cheat inflation_income; ///< inflation income factor
+	Cheat station_rating;   ///< 100% station rating
 };
 
 /** Available cheats. */
@@ -54,6 +55,7 @@ enum CheatNumbers {
 	CHT_CHANGE_DATE,     ///< Do time traveling.
 	CHT_INFLATION_COST,  ///< Change inflation cost factor
 	CHT_INFLATION_INCOME,///< Change inflation income factor
+	CHT_STATION_RATING,  ///< 100% station ratings
 
 	CHT_NUM_CHEATS,      ///< Number of cheats.
 };