no image files should be provided to fulltextsearch if files_image is set to 0

[ferdiga]

To my understanding
"files_image":"0"
below should prevent indexing of the image files.

• Content Providers:
  Deck 1.13.1
  []
  Files 29.0.1
  {
  "files_local": "1",
  "files_external": "2",
  "files_group_folders": "0",
  "files_encrypted": "0",
  "files_federated": "0",
  "files_size": "1",
  "files_pdf": "1",
  "files_office": "1",
  "files_image": "0",
  "files_audio": "0",
  "files_chunk_size": "2",
  "files_fulltextsearch_tesseract": {
  "version": "27.0.0",
  "enabled": "1",
  "psm": "4",
  "lang": "eng,deu,fra",
  "pdf": "1",
  "pdf_limit": "0"
  }

nevertheless
occ -vvv fulltextsearch:index
spends a considerable time (screenshot ~20 seconds) working on image files like this one

┌─ Indexing ────
│ Action: fillDocument
│ Provider: Files Account: christoph
│ Document: 45296825
│ Info: image/png
│ Title: *****/Bildschirmfoto 2018-12-17 um 20.13.49.png
│

BTW indexing of pdf and office documents is very fast