Normalize category storage PID on TYPO3v12

[mbrodala]

The new TypoScript parser introduced in TYPO3v12 yields a regular integer in case of a single storagePid. Only in case of a CSV this will be a string. This in turn leads to explode() failing with a type error in the integer case.

Fix this by normalizing the setting value to string.

Fixes: #301

[linawolf]

This patch solves the issue for the CategoryRepository, however we have the same issue in the PostRepository

[linawolf]

normalizePost.patch

Attached patch also solves this for the PostRepository

[mbrodala]

Thanks, I've refreshed the PR, included your change and also did the same for the TagRepository.

[linawolf]

@mbrodala your solution would still fail if the setting contained a non-scalar value like an array. It would be safer to test if it is set to a scalar value as I did in my patch, first.

[mbrodala]

That is something left to do in case TYPO3 ever supports this. Right now it can only be a string, the implicit conversion to a number could be considered a unintended side-effect.

Do you have an example where storagePid could be an array?