Base class dtors should be virtual and public or else protected and
non-virtual. This one was neither of these.
[ChangeLog][Potentially Source-Incompatible Changes][QtCore] The
QIODeviceBase destructor is now protected to avoid deleting objects of
classes derived from it through a QIODeviceBase pointer, which would
be undefined behavior.
Change-Id: Id390ace75d5b64f746d9b1865b8800c9f0590977
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
dca63b6ef6