Lily/SoundExpanded: fix set volume and start looping w/ start (#1534)

fixes #1355
fixes https://github.com/TurboWarp/extensions/assets/33787854/eda0410d-0a62-485a-8652-4edd323adc0d

extensions/Lily/SoundExpanded.js

@@ -323,7 +323,8 @@
 
     _startLooping(util, sound, loopStart, loopEnd) {
       const index = this._getSoundIndex(sound, util);
-      if (index < 0) return 0;
+      if (index < 0) return;
+
       const target = util.target;
       const sprite = util.target.sprite;
 
@@ -336,9 +337,12 @@
       }
 
       if (!soundPlayer.outputNode) return;
+
       soundPlayer.outputNode.loop = true;
       soundPlayer.outputNode.loopStart = loopStart;
-      soundPlayer.outputNode.loopEnd = loopEnd;
+      // If loopEnd is the default of 0, then loopStart is ignored
+      soundPlayer.outputNode.loopEnd =
+        loopEnd || soundPlayer.outputNode.buffer.duration;
     }
 
     startLooping(args, util) {
@@ -565,7 +569,7 @@
     }
 
     setProjectVolume(args) {
-      const value = Scratch.Cast.toNumber(args.VALUE);
+      const value = Scratch.Cast.toNumber(args.VALUE) / 100;
       const newVolume = Scratch.Cast.toNumber(Math.max(Math.min(value, 1), 0));
       runtime.audioEngine.inputNode.gain.value = newVolume;
     }