[splittiming] remove GameState "current timing" functions; add compatibility functions to 01 compat.lua

Themes/_fallback/Scripts/01 compat.lua

@@ -64,3 +64,13 @@ end
 if ScreenMetric then
 	ScreenMetric = Screen.Metric
 end
+
+--[[ GameState ]]
+--Aliases for old GAMESTATE timing functions.
+--These have been converted to SongPosition, but most themes still use these old functions.
+
+function GameState:GetSongBeat() return self:GetSongPosition():GetSongBeat() end
+function GameState:GetSongBeatNoOffset() return self:GetSongPosition():GetSongBeatNoOffset() end
+function GameState:GetSongBPS() return self:GetSongPosition():GetCurBPS() end
+function GameState:GetSongDelay() return self:GetSongPosition:GetDelay() end
+function GameState:GetSongFreeze() return self:GetSongPosition:GetFreeze() end

src/GameState.cpp

@@ -2462,11 +2462,11 @@ public:
 		ADD_METHOD( GetHardestStepsDifficulty );
 		ADD_METHOD( IsEventMode );
 		ADD_METHOD( GetNumPlayersEnabled );
-		ADD_METHOD( GetSongBeat );
+		/*ADD_METHOD( GetSongBeat );
 		ADD_METHOD( GetSongBeatVisible );
 		ADD_METHOD( GetSongBPS );
 		ADD_METHOD( GetSongFreeze );
-		ADD_METHOD( GetSongDelay );
+		ADD_METHOD( GetSongDelay );*/
 		ADD_METHOD( GetSongPosition );
 		ADD_METHOD( GetGameplayLeadIn );
 		ADD_METHOD( GetCoins );