[Gpsbabel-code] Fix for satellites log size

[Lorenzo M. C. <lo...@sa...>]

The mtk_zeroSats.patch fixes mtk behaviour when there are no sats in view 
and logging full sats info is enabled.

Tested on a couple BT747 datafiles, I think it can be applied.

As a matter of facts, I've finally been given a changing item-size log 
out of a friend's bt747, and can confirm mtk_log_len.diff, which I've 
already sent with "Subject: RFC: logLen handling for MTK" is needed there 
too.

Per, do you think they can be applied?

Thank you very much, yours,

 	lorenzo


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