2007-06-21  Sven Neumann  <sven@gimp.org>

	* app/base/tile-manager.[ch]
	* app/base/tile-manager-private.h: removed "level_below" from the
	TileManager struct.
	
	* app/base/tile-pyramid.c: use the TileManager's user_data to
	store a pointer to the lower level.

svn path=/trunk/; revision=22819