[gegl/soc-2012-ops] gegl: respect stride and width in gegl_buffer_iterate

[Maxime Nicco <maxnicco src gnome org>]

commit 235ac2846caecac48953951ccad5caab1e641c26
Author: Massimo Valentini <mvalentini src gnome org>
Date:   Fri Jul 6 19:30:05 2012 +0200

    gegl: respect stride and width in gegl_buffer_iterate

 gegl/buffer/gegl-buffer-access.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gegl/buffer/gegl-buffer-access.c b/gegl/buffer/gegl-buffer-access.c
index 294a70e..9f7681a 100644
--- a/gegl/buffer/gegl-buffer-access.c
+++ b/gegl/buffer/gegl-buffer-access.c
@@ -379,13 +379,13 @@ gegl_buffer_iterate (GeglBuffer          *buffer,
             {
               gint    row;
               gint    y  = bufy;
-              guchar *bp = buf + ((bufy) * width) * bpx_size;
+              guchar *bp = buf + bufy * buf_stride;
 
               for (row = offsety;
                    row < tile_height && y < height;
                    row++, y++)
                 {
-                  memset (bp, 0x00, buf_stride);
+                  memset (bp, 0x00, width * bpx_size);
                   bp += buf_stride;
                 }
             }