Fix the following warnings:
-[Warning] USBTester.cpp@45,0: #1299-D: members and base-classes will
be initialized in declaration order, not in member initialisation
list order
-[Warning] USBTester.h@41,0: #1300-D: ~USBTester inherits implicit
virtual
-[Warning] USBAudio.cpp@345,0: #1035-D: single-precision operand
implicitly converted to double-precision
-[Warning] USBHID.cpp@29,0: #1300-D: ~AsyncSend inherits implicit
virtual
-[Warning] USBHID.cpp@61,0: #1300-D: ~AsyncRead inherits implicit
virtual
-[Warning] USBHID.cpp@93,0: #1300-D: ~AsyncWait inherits implicit
virtual
-[Warning] EndpointResolver.cpp@125,26: '<<' in boolean context, did
you mean '<' ? [-Wint-in-bool-context]