minmea: Allow lines with only CR ending

[vpetrigo]

Hello,

I would like to propose a small change that allows processing of lines that end with CR only. I use tokenization of lines which are read from a GPS module with strtok() call with '\n as delimiter.

So that minmea_check() in the current implementation returns false as all lines do not end with either "\n" or "\r\n".

Let me know if it is applicable change.

[kosma]

This should preferably be changed to scan for any amounts and combination of \r and \n, like so:

while (*sentence == '\r' || *sentence == '\n')
    sentence++;
if (*sentence)
    return false;

[vpetrigo]

Hello @cmorganBE, @kosma!

Thank you for the review. I applied suggested solution. 😅

[vpetrigo]

@kosma, @cmorganBE sorry for bothering. Would you tell whether that PR can be merged?

[kosma]

Added tests, merged. Sorry it took so long. Thanks for the PR!