Add support for Mario Kart Double Dash (NTSC v1.0) (#85)

Author: bkacjios

source/modules/games/GM4E01-0.lua

@@ -0,0 +1,11 @@
+-- Mario Kart Double Dash! (NTSC v1.0)
+
+local core = require("games.core")
+
+local game = {
+	memorymap = {}
+}
+
+core.loadGenericControllerMap(0x803A4D6C, game)
+
+return game

source/music.lua

@@ -179,8 +179,6 @@ function music.getVolume()
 end
 
 local LOADED = false
-local IGNORE_CHANGE = false
-
 local ALLOW_INGAME_VOLUME = false
 
 memory.hook("OnGameClosed", "Set state unloaded", function()