NAME
	UnlockLayerInfo -- Unlock the LayerInfo structure.

    SYNOPSIS
	UnlockLayerInfo( li )
	                 a0

	void UnlockLayerInfo( struct Layer_Info *);

    FUNCTION
	After the operation is complete that required a LockLayerInfo,
	unlock the LayerInfo structure so that  other tasks may
	affect the layers.

    INPUTS
	li - pointer to the Layer_Info structure

     BUGS

     SEE ALSO
	LockLayerInfo(), graphics/layers.h