Use fromUtf8 for the conversion instead of copy assignment
Use fromUtf8 for the conversion instead of copy assignment

Change-Id: I9f450a55c7fa33811aaa2181eddc0241ea3bbc42
Reviewed-by: Sergey Belyashov <8871b4c2d635fca691211507eadbac3d0bc2695a@gmail.com>
Reviewed-by: Denis Shienkov <6a9c747bd2ba446682324cf340d3b86f30cf4d55@gmail.com>

RoadWorksSoftware/QtSerialPort-OS2,kobolabs/qtserialport,RoadWorksSoftware/QtSerialPort-OS2,kobolabs/qtserialport