Fix:
gestures.cpp:46:16: warning: this statement may fall through [-Wimplicit-fallthrough=]
gestures.cpp:47:5: note: here
gestures.cpp:48:9: warning: this statement may fall through [-Wimplicit-fallthrough=]
gestures.cpp:52:5: note: here
main.cpp: In function 'QByteArray windowsVersionToString(QSysInfo::WinVersion)':
main.cpp:40:12: warning: enumeration value 'WV_CE' not handled in switch [-Wswitch]
...
main.cpp: In function 'QByteArray macVersionToString(QSysInfo::MacVersion)':
main.cpp:68:12: warning: enumeration value 'MV_10_12' not handled in switch [-Wswitch]
...
widget.cpp: In member function 'CustomItem* Widget::checkedItem() const':
widget.cpp:238:12: warning: 'item' may be used uninitialized in this function [-Wmaybe-uninitialized]
Change-Id: I434784e86d127e56b92663cb45eba7d60d8f8eaf
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>