fftools/textformat: Cleanup work

[softworkz]

The first patch is purely a rename. I had deferred it since the previous patchset was quite massive already.

The second patch removes unnecessary casts as promised earlier.

Versions

V2

• Fix Windows GCC build

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[softworkz]

/submit

[ffmpeg-codebot]

Submitted as [email protected]

To fetch this version into FETCH_HEAD:

git fetch https://github.com/ffstaging/FFmpeg pr-ffstaging-104/softworkz/submit_avtext_validation-v1

To fetch this version to local tag pr-ffstaging-104/softworkz/submit_avtext_validation-v1:

git fetch --no-tags https://github.com/ffstaging/FFmpeg tag pr-ffstaging-104/softworkz/submit_avtext_validation-v1

[softworkz]

/submit

[ffmpeg-codebot]

Submitted as [email protected]

To fetch this version into FETCH_HEAD:

git fetch https://github.com/ffstaging/FFmpeg pr-ffstaging-104/softworkz/submit_avtext_validation-v2

To fetch this version to local tag pr-ffstaging-104/softworkz/submit_avtext_validation-v2:

git fetch --no-tags https://github.com/ffstaging/FFmpeg tag pr-ffstaging-104/softworkz/submit_avtext_validation-v2