QDeclarativeRadioData can crash in QML app if no radio data available

I have a QML application which uses Radio element and it's radioData variable for accessing RDS channel name etc.

In environment without radio hardware, the radioData (in c++ side) is null and accessing it's variables causes the QML program to crash. This could be easily fixed with sanity checks in qdeclarativeradiodata.cpp.

Top of stack trace:

#0 QRadioData::stationName (this=0x0) at radio/qradiodata.cpp:300
#1 0x678b02e9 in QDeclarativeRadioData::stationName (this=0x9636170) at qdeclarativeradiodata.cpp:242
#2 0x678be082 in QDeclarativeRadioData::qt_metacall (this=0x9636170, _c=QMetaObject::ReadProperty, _id=3,

This is enough to trigger the bug:

import QtQuick 2.4
import QtQuick.Window 2.2
import QtMultimedia 5.0

Window {
    visible: true
    Radio {
           id: radio
           band: Radio.FM
    }
    Text {
        text: radio.radioData.stationName
    }
}

It must be run in an environment with no radio hardware.