musicVolume is not speed.... wtf (#586)

fixes funkin.game.cutscenes.DialogueCutscene
if "musicVolume" was present in the current line, it would grab the value of "speed" instead of "musicVolume"
and if "speed" wasn't present, it would crash the game

lmao

Author: betpowo

source/funkin/game/cutscenes/DialogueCutscene.hx

@@ -86,7 +86,7 @@ class DialogueCutscene extends Cutscene {
 					callback: node.getAtt('callback'),
 					changeDefAnim: node.getAtt('changeDefAnim'),
 					speed: Std.parseFloat(node.getAtt("speed")).getDefault(0.05),
-					musicVolume: node.has.musicVolume ? (volume = Std.parseFloat(node.att.speed).getDefault(0.8)) : null,
+					musicVolume: node.has.musicVolume ? (volume = Std.parseFloat(node.att.musicVolume).getDefault(0.8)) : null,
 					changeMusic: node.has.changeMusic ? FlxG.sound.load(Paths.music(node.att.changeMusic), volume, true) : null,
 					playSound: node.has.playSound ? FlxG.sound.load(Paths.sound(node.att.playSound)) : null,
 					nextSound: node.has.nextSound ? FlxG.sound.load(Paths.sound(node.att.nextSound)) : null,