* app/base/base-types.h: Rename the convenient channel offset
defines from FOO_PIX to FOO as this increases readability.

* app/base/color-balance.c
* app/base/colorize.c
* app/base/desaturate.c
* app/base/hue-saturation.c
* app/base/siox.c
* app/base/threshold.c

* app/core/gimp-edit.c
* app/core/gimp-transform-region.c
* app/core/gimpchannel.c
* app/core/gimpdrawable-bucket-fill.c
* app/core/gimpdrawable-convert.c
* app/core/gimpdrawable-stroke.c
* app/core/gimpdrawable.c
* app/core/gimpimage-convert.c
* app/core/gimpimage.c
* app/core/gimppalette-import.c
* app/core/gimppickable.c

* app/gegl/gimpoperation*mode.c
* app/gegl/gimpoperationcolorbalance.c
* app/gegl/gimpoperationcolorize.c
* app/gegl/gimpoperationhuesaturation.c
* app/gegl/gimpoperationlevels.c
* app/gegl/gimpoperationposterize.c
* app/gegl/gimpoperationthreshold.c

* app/paint-funcs/subsample-region.c

* app/paint/gimpclone.c
* app/paint/gimppaintbrush.c

* app/widgets/gimpviewrenderer.c: Adapt.

svn path=/trunk/; revision=27324