NAME
	ParentOfFH -- returns a lock on the parent directory of a file (V36)

   SYNOPSIS
	lock = ParentOfFH(fh)
	D0               D1

	 BPTR ParentOfFH( BPTR)

   FUNCTION
	Returns a shared lock on the parent directory of the filehandle.

   INPUTS
	fh   - Filehandle you want the parent of.

   RESULT
	lock - Lock on parent directory of the filehandle or NULL for failure.

   SEE ALSO
	Parent(),  Lock(),  UnLock()  DupLockFromFH()