Warnings on member initialisation order in NMEAParser and NMEASentence

[jmccabe]

NMEASentence and NMEAParser constructors cause warnings on member variable initialisation order; I suggest changing from:

NMEASentence::NMEASentence() 
: isvalid(false)
, checksumIsCalculated(false)
, calculatedChecksum(0)
, parsedChecksum(0)
{ }

to

NMEASentence::NMEASentence() 
: isvalid(false)
, checksumIsCalculated(false)
, parsedChecksum(0)
, calculatedChecksum(0)
{ }

and from

NMEAParser::NMEAParser() 
: log(false)
, maxbuffersize(NMEA_PARSER_MAX_BUFFER_SIZE)
, fillingbuffer(false)
{ }

to

NMEAParser::NMEAParser()
: fillingbuffer(false)
, maxbuffersize(NMEA_PARSER_MAX_BUFFER_SIZE)
, log(false)
{ }

or use non-static member initialisation where they're declared.