[gegl/abyss] buffer: fixed memory bug in CLAMP abyss policy

[Ville Sokk <villesokk src gnome org>]

commit 7d2b60a7a64731b1af1930c4b49fdf83a92b0e5d
Author: Ville Sokk <ville sokk gmail com>
Date:   Sun Jul 8 20:00:08 2012 +0300

    buffer: fixed memory bug in CLAMP abyss policy

 gegl/buffer/gegl-buffer-access.c |   12 ++++++------
 1 files changed, 6 insertions(+), 6 deletions(-)
---
diff --git a/gegl/buffer/gegl-buffer-access.c b/gegl/buffer/gegl-buffer-access.c
index 6851b16..7aecf18 100644
--- a/gegl/buffer/gegl-buffer-access.c
+++ b/gegl/buffer/gegl-buffer-access.c
@@ -970,13 +970,13 @@ gegl_buffer_iterate_read_abyss_clamp (GeglBuffer          *buffer,
             { /* x was clamped. Copy a single color since x remains clamped in
                this iteration. */
               guchar color[128];
-              gint i;
+              gint   i;
 
               /* gap between current column and left side of abyss rect */
               lskip = (buffer_abyss_x) - (buffer_x + bufx);
               /* gap between current column and end of roi */
               rskip = width - bufx;
-              pixels = (lskip > 0) ? lskip : rskip;
+              pixels = (lskip > 0 && lskip < width) ? lskip : rskip;
 
               if (row_in_abyss)
                 { /* y remains clamped in this iteration so don't change the color */
@@ -1008,8 +1008,8 @@ gegl_buffer_iterate_read_abyss_clamp (GeglBuffer          *buffer,
                       for (i = 0; i < pixels * bpx_size; i += bpx_size)
                         memcpy (bp + i, color, bpx_size);
 
-                      if (buffer_y + y >= buffer_abyss_y
-                          && buffer_y + y < abyss_y_total - 1)
+                      if (buffer_y + y >= buffer_abyss_y &&
+                          buffer_y + y < abyss_y_total - 1)
                         tp += tile_stride;
                       bp += buf_stride;
                     }
@@ -1036,8 +1036,8 @@ gegl_buffer_iterate_read_abyss_clamp (GeglBuffer          *buffer,
                   else
                     memcpy (bp, tp, pixels * px_size);
 
-                  if (buffer_y + y >= buffer_abyss_y
-                      && buffer_y + y < abyss_y_total - 1)
+                  if (buffer_y + y >= buffer_abyss_y &&
+                      buffer_y + y < abyss_y_total - 1)
                     tp += tile_stride;
                   bp += buf_stride;
                 }