Fix typo that prevented parsing of AID-ALPSRV messages, fix size of id3 field

[wheirman]

No description provided.

[semuadmin]

Good spot - Looks fine, but out of interest, which specific UBX receiver and protocol version are you using to test this? (I didn't realise the ALP servers were still operational)

[wheirman]

I have a NEO-6M module with SW 7.03. https://alp.u-blox.com/ is still serving usable files for this.

[semuadmin]

Hi @wheirman Your changes have been merged into RC 1.2.50 and will be released ideally by the end of January.

Could I ask you to use the PR template provided and ensure all commits are signed in any future PRs. Thanks.

FYI I've also added an additional AID-ALPSRV GET message definition to cater for the Data Send (as well as Data Request) variant of this message. At the moment I'm testing with synthetic data - if you have 'real' binary AID-ALPSRV GET AND SET messages you'd be willing to share for testing purposes, that would be useful.