Win32 fixes:
- added SDO_BLOCK_SIZE macro to win32 config.h
- added explicit casts to remove compiler warnings to sdo.c
- added missing exports to Canfestival-3.def

LIBRARY	can_anagate_win32

EXPORTS
   canReceive_driver
   canSend_driver
   canOpen_driver
   canClose_driver
   canChangeBaudRate_driver