NAME
	UnlockLayerRom -- Unlock Layer structure by ROM(gfx lib) code.

   SYNOPSIS
	UnlockLayerRom( layer )
			 a5

	void UnlockLayerRom( struct Layer * );

   FUNCTION
	Release the lock on this layer. If the same task has called
	LockLayerRom more than once than the same number of calls to
	UnlockLayerRom must happen before the layer is actually freed
	so that other tasks may use it.
	This call does destroy scratch registers.
	This call is identical to UnlockLayer (layers.library).

   INPUTS
	layer - pointer to Layer structure

   BUGS

   SEE ALSO
	LockLayerRom() layers.library/UnlockLayer() graphics/clip.h