Decoder must not write more bit than requested

[henrygab]

Fixes the following error messages when using em4x70 tags:

[#] Should have a multiple of 8 bits, was sent 65
[#] Should have a multiple of 8 bits, was sent 33

The underlying issue is that the manchester decoder was writing one extra bit of data when reading certain tag data. (the buffer happened to always be larger than necessary, so did not happen to corrupt data)

To repro the problem behavior: lf em 4x70 --block 12 --data 0xAAAA lf em 4x70 --block 0 --data 8765

[github-actions[bot]]

You are welcome to add an entry to the CHANGELOG.md as well

[iceman1001]

Nice fix, And we still have a bug in the manchester decoder. check.