-Made osd_interface base class for OSD and moved initialization for each subsystem in it as virtual calls. (nw)
-Moved midi handling in base class
-Cleaned running_machine of information of next machine
-All is cleaned after exiting of running_machine so debugger window is removed as well till next machine is started
-Made osdmini to compile
fixed usage of uninitialized member in device_serial_interface (nw)