QML Math.random() might return 1.0, javascript Math.random never should

If qrand() call in Math.random() returns RAND_MAX, result is 1.0. Code in qml/jsruntime/qv4mathobject.cpp:

return Encode(qrand() / (double) RAND_MAX);

In Javascript, max value is exclusive:
http://www.w3schools.com/jsref/jsref_random.asp