NAME
	UnlockLayers -- Unlock all layers from graphics output.
	                Restart graphics output to layers that have been waiting

    SYNOPSIS
	UnlockLayers( li )
	              a0

	void UnlockLayers( struct Layer_Info *);

    FUNCTION
	Make all layers in this layer list unlocked.
	Then call UnlockLayerInfo

    INPUTS
	li - pointer to the Layer_Info structure

    BUGS

    SEE ALSO
	LockLayers(), UnlockLayer(), graphics/layers.h