No parsed QGeoPositionInfo from NmeaData due to wrong checksum

Captured NmeaData is analysed and checked for its checksum in "qlocationutils.cpp" QLocationUtils::hasValidNmeaChecksum.

The checksum is represented by 2 Hexcharacters at the end of each datasentence.
My GPS-device sends data like:

$GPVTG,,T,,M,,N,,K,N*2C
$GPRMC,,V,,,,,,,,,,N*53
$GPGSA,A,1,,,,,,,,,,,,,,,*1E

The problem is that on line 298 the computed checksum is represented in a string with

s.sprintf("%02x", result);

.
That string is compared to the captured data, so its often something like "2c" == "2C" and the data is considered invalid.

To support both ways (sending upper and lower), a change to following helps:

if(islower(data[asteriskIndex+1]) || islower(data[asteriskIndex+2]))
        s.sprintf("%02x", result);
    else
        s.sprintf("%02X", result);