* Fix GCC build.
1) do not fwd declare enums
2) include only base class header file IPropertySheet.
* DSInit(): make sure sound devices are cleaned before the 2nd call.
And use std::string to avoid need of memory management.
. class hierarchy: WinVideo IS_A Video (ie. WinVideo is a subclass of Video)
. GetVideo() singleton instance of WinVideo in AppleWin.cpp, exposed via Interface.h
* Interface.h: ensure that functions in the interface are not exported by other header files.
This is generally harmless, except for the presence of default arguments, in which case the version with default arguments must come first.
To avoid the issue, these functions are only ever exported in the Interface.h header file.
This is not complete as header files from Windows/.. are still included in:
Keyboard.cpp
SerialComms.cpp
Joystick.cpp
But probably these are arch specific and will have to be completely reimplemented elsewhere.
