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

usr/bin/CANOpenShell
usr/bin/TestMasterSlave
#usr/bin/TestMasterMicroMod
#usr/bin/DS401_Slave_Gui
#usr/bin/DS401_Master