galaxian: fixed regression in missing presets

src/ide/ui.ts

@@ -2327,7 +2327,7 @@ async function startPlatform() {
     // try to load last file (redirect)
     var lastid = userPrefs.getLastPreset();
     // load first preset file, unless we're in a repo
-    var defaultfile = lastid || (repo_id ? null : PRESETS[0].id);
+    var defaultfile = lastid || (repo_id ? null : (PRESETS[0] && PRESETS[0].id));
     qs.file = defaultfile || 'DEFAULT';
     if (!defaultfile) {
       alertError("There is no default main file for this project. Try selecting one from the pulldown.");

src/platform/galaxian.ts

@@ -27,6 +27,7 @@ class GalaxianPlatform extends BaseZ80MachinePlatform<GalaxianMachine> implement
 class GalaxianScramblePlatform extends GalaxianPlatform implements Platform {
 
   newMachine()          { return new GalaxianScrambleMachine(); }
+  getPresets()          { return GALAXIAN_PRESETS; }
 
 }