Return to setup loop if cutscene fails to load.

If the intro cutscene failed to play, the game would get stuck in its setup loop with a blank screen and no menu. This caused a hang in the demo, which has no cutscenes. Also in the demo, the game would not end once the elevator switch was activated, since the game was expecting to be able to play an ending cutscene. Explicitly entering the setup loop if a cutscene fails to play fixes both problems.

Author: icosahedral-dragon

Diff for: src/GameSrc/cutsloop.c

@@ -275,7 +275,12 @@ short play_cutscene(int id, bool show_credits)
   MacTuneKillCurrentTheme();
 
   cutscene_filehandle = ResOpenFile(cutscene_files[id]);
-  if (cutscene_filehandle <= 0) return 0;
+  if (cutscene_filehandle <= 0) {
+      // If we failed to play the cutscene, go to setup / credits.
+      _new_mode = SETUP_LOOP;
+      chg_set_flg(GL_CHG_LOOP);
+      return 0;
+  }
 
   INFO("Playing Cutscene %i", id);