* app/core/gimpitem.c
(gimp_item_get_offset_x)
(gimp_item_get_offset_y): New offset getters for inline use.

* app/core/gimpchannel.c
* app/core/gimpdrawable.c
* app/core/gimpimage-merge.c
* app/core/gimpimage-resize.c
* app/tools/gimptexttool.c: Don't access GimpItem offset members
directly, use gimp_item_set_offset() and
gimp_item_get_offset_[xy]() instead.

svn path=/trunk/; revision=27848