Filip Roséen authored Sep 26, 2016 and Thomas Guillem committed Sep 26, 2016

The dynamic type of the object referred to by "event" is not
QMouseEvent if "event->type()" is Event::Leave.

The previous implementation would unconditionally refer to the object
as-if it was a QMouseEvent when it is simply a QEvent; causing
undefined-behavior.

Signed-off-by: Thomas Guillem <thomas@gllm.fr>