Check if path is a file in FileSystemLoader

[revoltek-daniel]

Q	A
Branch?	2.x
Bug fix?	yes
New feature?	no
BC breaks?	no
Deprecations?	no
License	MIT

If the resolve URL is called without a file like "media/cache/resolve/image_xs/media/image/40/93/" the FileinfoMimeTypeGuesser will fail with a InvalidArgumentException, because the mime type checker will check if the path is a file. https://github.com/symfony/symfony/blob/7.2/src/Symfony/Component/Mime/FileinfoMimeTypeGuesser.php#L47

So we should check before if it is a file or catch the exception.

[coveralls]

coverage: 81.665% (-0.02%) from 81.688%
when pulling 59a78cd on revoltek-daniel:patch-1
into 98e0318 on liip:2.x.

[dbu]

this makes sense, thank you!

[dbu]

https://github.com/liip/LiipImagineBundle/releases/tag/2.13.3