* Change win32 client Sys_Sleep so it ONLY sleeps since before it was waking on

more or less any input event; fine for the server, not so much use for the
  client
* In the main loop, don't bother sleeping if it's going to be less than 10ms as
  the methods we're using to sleep at the moment aren't very precise
* Add Sys_PlatformInit for platform specific initialisation
* In win32 Sys_PlatformInit force selection of the DirectX SDL backend in order
  to get better fullscreen mouse input (in conjunction with a patched SDL DLL
  http://bugzilla.libsdl.org/show_bug.cgi?id=265)

code/sys/sys_main.c

@@ -533,6 +533,8 @@ int main( int argc, char **argv )
 	}
 #endif
 
+	Sys_PlatformInit( );
+
 	Sys_ParseArgs( argc, argv );
 	Sys_SetBinaryPath( Sys_Dirname( argv[ 0 ] ) );
 	Sys_SetDefaultInstallPath( DEFAULT_BASEDIR );