[gegl/abyss] buffer: remove unnecessary additions and subtractions from buffer read iterators

[Ville Sokk <villesokk src gnome org>]

commit f758f98dbeca038543fd4b44100d86c0c40be21a
Author: Ville Sokk <ville sokk gmail com>
Date:   Wed Jun 27 19:53:32 2012 +0300

    buffer: remove unnecessary additions and subtractions from buffer read iterators

 gegl/buffer/gegl-buffer-access.c |   10 +++++-----
 1 files changed, 5 insertions(+), 5 deletions(-)
---
diff --git a/gegl/buffer/gegl-buffer-access.c b/gegl/buffer/gegl-buffer-access.c
index 8e0759f..9f18b42 100644
--- a/gegl/buffer/gegl-buffer-access.c
+++ b/gegl/buffer/gegl-buffer-access.c
@@ -536,7 +536,7 @@ gegl_buffer_iterate_read_simple (GeglBuffer          *buffer,
           bp = buf + bufy * buf_stride + bufx * bpx_size;
 
           if (width + offsetx - bufx < tile_width)
-            pixels = (width + offsetx - bufx) - offsetx;
+            pixels = width - bufx;
           else
             pixels = tile_width - offsetx;
 
@@ -642,7 +642,7 @@ gegl_buffer_iterate_read_abyss_none (GeglBuffer          *buffer,
             bp = buf + bufy * buf_stride + bufx * bpx_size;
 
             if (width + offsetx - bufx < tile_width)
-              pixels = (width + offsetx - bufx) - offsetx;
+              pixels = width - bufx;
             else
               pixels = tile_width - offsetx;
 
@@ -800,7 +800,7 @@ gegl_buffer_iterate_read_abyss_color (GeglBuffer          *buffer,
             bp = buf + bufy * buf_stride + bufx * bpx_size;
 
             if (width + offsetx - bufx < tile_width)
-              pixels = (width + offsetx - bufx) - offsetx;
+              pixels = width - bufx;
             else
               pixels = tile_width - offsetx;
 
@@ -1017,7 +1017,7 @@ gegl_buffer_iterate_read_abyss_clamp (GeglBuffer          *buffer,
           else
             {
               if (width + offsetx - bufx < tile_width)
-                pixels = (width + offsetx - bufx) - offsetx;
+                pixels = width - bufx;
               else
                 pixels = tile_width - offsetx;
 
@@ -1120,7 +1120,7 @@ gegl_buffer_iterate_read_abyss_loop (GeglBuffer          *buffer,
           bp = buf + bufy * buf_stride + bufx * bpx_size;
 
           if (width + offsetx - bufx < tile_width)
-            pixels = (width + offsetx - bufx) - offsetx;
+            pixels = width - bufx;
           else
             pixels = tile_width - offsetx;