Warnings update from 0.6.3

[darix]

I: Program is likely to break with new gcc. Try -fno-strict-aliasing.
W: nitrokey-app strict-aliasing-punning src/response.cpp:420, 422

If you cant fix the code for this warning just set the CFLAG mentioned in the error message for response.cpp.

The more detailed list:

--
src/ui/pindialog.h: In constructor 'PinDialog::PinDialog(const QString&, const QString&, Device*, PinDialog::Usage, PinDialog::PinType, bool, QWidget*)':
src/ui/pindialog.h:61:11: warning: 'PinDialog::_pinType' will be initialized after [-Wreorder]
--
           ^
src/ui/pindialog.cpp:35:27: warning:   base 'QDialog' [-Wreorder]
--
                           ^
src/ui/pindialog.cpp:32:1: warning:   when initialized here [-Wreorder]
--
src/response.cpp: In member function 'int Response::getResponse(Device*)':
src/response.cpp:420:68: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
--
                                                                    ^
src/response.cpp:422:66: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
--
src/ui/stick20-response-task.cpp: In member function 'void Stick20ResponseTask::done(int)':
src/ui/stick20-response-task.cpp:299:68: warning: statement has no effect [-Wunused-value]
--
src/utils/stick20hid.c: In function 'DebugAppendTimestampToLog':
src/utils/stick20hid.c:226:10: warning: unused variable 'CrString' [-Wunused-variable]
--
src/utils/hid_libusb.c: In function 'hid_open_path':
src/utils/hid_libusb.c:876:13: warning: variable 'num_devs' set but not used [-Wunused-but-set-variable]
--

[szszszsz]

Fixed in v1.0. Warnings now are treated as errors and halt the build.