Panic when cascading headless from site config to section that does not have an _index.md file

[jmooring]

content

content/
└── s1/
    └── p1.md

config

[[cascade]]
headless = true
[cascade._target]
path = '/s1**'

Hugo v0.122.0 emitted this warning...

WARN .File.TranslationBaseName on zero object. Wrap it in if or with: {{ with .File }}{{ .TranslationBaseName }}{{ end }}

...but still published s1/p1 (which I think was wrong too).

failing test case

func TestFoo(t *testing.T) {
	t.Parallel()

	files := `
-- hugo.toml --
disableKinds = ['rss','sitemap','taxonomy','term']
[[cascade]]
headless = true
[cascade._target]
path = '/s1**'
-- content/s1/p1.md --
---
title: p1
---
-- layouts/_default/single.html --
{{ .Title }}|
-- layouts/_default/list.html --
{{ .Title }}|
  `
	b := hugolib.Test(t, files)

	b.AssertFileExists("public/index.html", true)
	b.AssertFileExists("public/s1/index.html", false)
	b.AssertFileExists("public/s1/p1/index.html", false)
}

[AlanBreck]

Thank you for the prompt fix!

[github-actions]

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