hugsdir(): under Win32, look for and honour HUGSDIR env variable before consulting GetModuleFileName()
hugsdir(): under Win32, look for and honour HUGSDIR env variable
before consulting GetModuleFileName()

FranklinChen/Hugs,FranklinChen/Hugs,FranklinChen/Hugs,FranklinChen/Hugs,FranklinChen/Hugs,FranklinChen/Hugs,FranklinChen/Hugs