NAME 
       NewRegion -- Get an empty region.
   SYNOPSIS 
       region = NewRegion()
	d0
	struct Region *NewRegion();
   FUNCTION 
	Create a Region structure, initialize it to empty, and return
	a pointer it.
   RESULTS
	region - pointer to initialized region. If it could not allocate
		required memory region = NULL.
   INPUTS 
	none
   BUGS 
   SEE ALSO
	graphics/regions.h