Codechange: Specify underlying type for all enums excluding those exposed to scripts. (#13383)

src/timer/timer_game_common.h

@@ -94,7 +94,7 @@ public:
 		return Date{(365 * year_as_int) + number_of_leap_years};
 	}
 
-	enum Trigger {
+	enum Trigger : uint8_t {
 		DAY,
 		WEEK,
 		MONTH,
@@ -102,7 +102,7 @@ public:
 		YEAR,
 	};
 
-	enum Priority {
+	enum Priority : uint8_t {
 		NONE, ///< These timers can be executed in any order; there is no Random() in them, so order is not relevant.
 
 		/* All other may have a Random() call in them, so order is important.

src/timer/timer_game_realtime.h

@@ -27,7 +27,7 @@
  */
 class TimerGameRealtime {
 public:
-	enum PeriodFlags {
+	enum PeriodFlags : uint8_t {
 		ALWAYS, ///< Always run, even when paused.
 		UNPAUSED, ///< Only run when not paused.
 		AUTOSAVE, ///< Only run when not paused or there was a Command executed recently.

src/timer/timer_game_tick.h

@@ -24,7 +24,7 @@ public:
 	using Ticks = int32_t; ///< The type to store ticks in
 	using TickCounter = uint64_t; ///< The type that the tick counter is stored in
 
-	enum Priority {
+	enum Priority : uint8_t {
 		NONE, ///< These timers can be executed in any order; the order is not relevant.
 
 		/* For all other priorities, the order is important.