Move pane down error, when there is no pane below (ie. first time executed)

[DinisCruz]

After

I had the error

(btw that link is not working)

Full stack of error

ypeError: Cannot read property '0' of undefined
  at Object.module.exports.move (/Users/diniscruz/.atom/packages/layout-manager/lib/layout-manager.coffee:49:6)
  at Object.module.exports.moveDown (/Users/diniscruz/.atom/packages/layout-manager/lib/layout-manager.coffee:34:17)
  at atom-workspace.<anonymous> (/Users/diniscruz/.atom/packages/layout-manager/lib/layout-manager.coffee:10:69)
  at atom-workspace.handler (/Applications/Atom.app/Contents/Resources/app/src/space-pen-extensions.js:115:32)
  at atom-workspace.jQuery.event.dispatch (/Applications/Atom.app/Contents/Resources/app/node_modules/space-pen/vendor/jquery.js:4681:9)
  at atom-workspace.elemData.handle (/Applications/Atom.app/Contents/Resources/app/node_modules/space-pen/vendor/jquery.js:4359:46)
  at CommandRegistry.module.exports.CommandRegistry.handleCommandEvent (/Applications/Atom.app/Contents/Resources/app/src/command-registry.js:243:29)
  at /Applications/Atom.app/Contents/Resources/app/src/command-registry.js:3:61
  at CommandPaletteView.module.exports.CommandPaletteView.confirmed (/Applications/Atom.app/Contents/Resources/app/node_modules/command-palette/lib/command-palette-view.js:120:32)
  at CommandPaletteView.module.exports.SelectListView.confirmSelection (/Applications/Atom.app/Contents/Resources/app/node_modules/archive-view/node_modules/atom-space-pen-views/lib/select-list-view.js:336:21)
  at space-pen-div.atom.commands.add.core:confirm (/Applications/Atom.app/Contents/Resources/app/node_modules/archive-view/node_modules/atom-space-pen-views/lib/select-list-view.js:109:19)
  at CommandRegistry.module.exports.CommandRegistry.handleCommandEvent (/Applications/Atom.app/Contents/Resources/app/src/command-registry.js:243:29)
  at /Applications/Atom.app/Contents/Resources/app/src/command-registry.js:3:61
  at KeymapManager.module.exports.KeymapManager.dispatchCommandEvent (/Applications/Atom.app/Contents/Resources/app/node_modules/atom-keymap/lib/keymap-manager.js:549:16)
  at KeymapManager.module.exports.KeymapManager.handleKeyboardEvent (/Applications/Atom.app/Contents/Resources/app/node_modules/atom-keymap/lib/keymap-manager.js:391:22)
  at HTMLDocument.module.exports.WindowEventHandler.onKeydown (/Applications/Atom.app/Contents/Resources/app/src/window-event-handler.js:167:20)