wrong chunk size in aiff files

[Knurrhahn]

Describe the bug
I found out that the chunk size in aiff for meta information sometimes is too small. Most of the decoders don't care but my old Pioneer XDJ aero can't read them.

I wrote a script to correct the chunk sizes but it would be nice if fre:ac was not producing corrupt files.

To Reproduce
Steps to reproduce the behavior:

1. Convert a aiff with metadata, use resampling and sample konverter, use SndFile AIFF v.1.2.0
2. try to play it on a old player or check it with an hex editor

Expected behavior
Correct junk sizes in aiff.

Screenshots
NAME chunk size is 0x11 but must be 0x12:

System (please complete the following information)

• OS: MacOS 15
• fre:ac v1.1.7 Mar ARM

Additional context