[gthumb] Fixed creation of blur thumbnails for jpeg images

[Paolo Bacchilega <paobac src gnome org>]

commit 3fe809b981e89b72357a299f5346da8e55b2cabc
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Sun Feb 17 14:34:40 2013 +0100

    Fixed creation of blur thumbnails for jpeg images

 extensions/cairo_io/cairo-image-surface-jpeg.c |    2 +-
 extensions/exiv2_tools/exiv2-utils.cpp         |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/extensions/cairo_io/cairo-image-surface-jpeg.c b/extensions/cairo_io/cairo-image-surface-jpeg.c
index 3d685ed..66f12d3 100644
--- a/extensions/cairo_io/cairo-image-surface-jpeg.c
+++ b/extensions/cairo_io/cairo-image-surface-jpeg.c
@@ -205,7 +205,7 @@ _cairo_image_surface_create_from_jpeg (GInputStream  *istream,
                for (srcinfo.scale_denom = 1; srcinfo.scale_denom <= 16; srcinfo.scale_denom++) {
                        jpeg_calc_output_dimensions (&srcinfo);
                        if ((srcinfo.output_width < requested_size) || (srcinfo.output_height < 
requested_size)) {
-                               srcinfo.scale_denom += 1;
+                               srcinfo.scale_denom -= 1;
                                break;
                        }
                }
diff --git a/extensions/exiv2_tools/exiv2-utils.cpp b/extensions/exiv2_tools/exiv2-utils.cpp
index d478621..e1365bd 100644
--- a/extensions/exiv2_tools/exiv2-utils.cpp
+++ b/extensions/exiv2_tools/exiv2-utils.cpp
@@ -1405,7 +1405,7 @@ exiv2_generate_thumbnail (const char *uri,
                double ratio_delta = (image_ratio > thumbnail_ratio) ? (image_ratio - thumbnail_ratio) : 
(thumbnail_ratio - image_ratio);
 
                if ((ratio_delta > MAX_RATIO_ERROR_TOLERANCE) /* the tolerance is used because the reduced 
image can have a slightly different ratio due to rounding errors */
-                   || (MAX (pixbuf_width, pixbuf_height) < (requested_size * 0.90))) /* ignore the embedded 
image if it's too small compared to the requested size */
+                   || (MAX (pixbuf_width, pixbuf_height) < requested_size)) /* ignore the embedded image if 
it's too small compared to the requested size */
                {
                        g_object_unref (pixbuf);
                        return NULL;