bail early on errors

Dependencies

• [2] EZHO4TSW new file-system format for freewheeling apps
• [3] Y5BXW7FX check for syntax errors when loading app
• [*] LRDM35CE app running again

Change contents

• replacement in live.lua at line 82
  [2.1680]→[2.1680:1697](∅→∅)
  − return err
  [2.1680]

  [3.147]
  + error(err)