[Bug]: TypeError when not specifying stories in v7

[tobiasdiez]

Describe the bug

If you comment out, the stories option in the following config,

module.exports = {
  stories: ['../components/*.stories.ts'],
  core: {
    disableTelemetry: true,
  },
  framework: {
    name: '@storybook/vue3-vite',
    options: {},
  },
}

then storiesbooks fails with

info => Starting manager..
D:\Programming\JabRefOnline\node_modules\@storybook\core-common\dist\index.js:807
    normalizeStories = (entries, options) => entries.map(entry => normalizeStoriesEntry(entry, options));       
                                                     ^

TypeError: Cannot read properties of undefined (reading 'map')
    at normalizeStories (D:\Programming\JabRefOnline\node_modules\@storybook\core-common\dist\index.js:807:54)  
    at getStoryIndexGenerator (D:\Programming\JabRefOnline\node_modules\@storybook\core-server\dist\index.js:20:640)

To Reproduce

https://github.com/JabRef/JabRefOnline/pull/1726

System

Environment Info:

  System:
    OS: Windows 10 10.0.22621
    CPU: (20) x64 12th Gen Intel(R) Core(TM) i7-1280P
  Binaries:
    Node: 19.4.0 - C:\Program Files\nodejs\node.EXE
    Yarn: 3.3.0 - C:\Program Files (x86)\Yarn\bin\yarn.CMD
    npm: 9.2.0 - C:\Program Files\nodejs\npm.CMD
  Browsers:
    Edge: Spartan (44.22621.1105.0), Chromium (109.0.1518.61)
  npmPackages:
    @storybook/core-server: ^7.0.0-beta.32 => 7.0.0-beta.32
    @storybook/vue3: ^7.0.0-beta.32 => 7.0.0-beta.32
    @storybook/vue3-vite: 7.0.0-beta.32 => 7.0.0-beta.32

Additional context

No response