2003-07-07  Sven Neumann  <sven@gimp.org>

	* libgimpmath/gimpmathtypes.h
	* libgimpmath/gimpvector.h: moved struct declarations.

	* libgimpmath/gimpmatrix.[ch]: made GimpMatrix3 and GimpMatrix4
	structs instead of typedefs for arrays. Pass them by reference,
	not by value. Added lots of const qualifiers.

	* app/core/gimpchannel.c
	* app/core/gimpdrawable-transform-utils.[ch]
	* app/core/gimpdrawable-transform.[ch]
	* app/core/gimpdrawable.c
	* app/core/gimpitem-linked.[ch]
	* app/core/gimpitem.[ch]
	* app/core/gimplayer.c
	* app/pdb/transform_tools_cmds.c
	* app/tools/gimpperspectivetool.c
	* app/tools/gimprotatetool.c
	* app/tools/gimpscaletool.c
	* app/tools/gimpsheartool.c
	* app/tools/gimptransformtool.c
	* app/vectors/gimpvectors.c
	* tools/pdbgen/pdb/transform_tools.pdb: changed accordingly.