gdk-pixbuf was updated to version 2.31.6 to fix a secuirty vulnerability and several bugs.

- Update to version 2.31.6 (boo#942801):
+ Really fix bgo#752297. This is CVE-2015-4491.
+ Updated translations.
- Update to version 2.31.5:
+ Add support for g_autoptr for all object types (bgo#750497).
+ Avoid a possible divide-by-zero in the pixbuf loader (bgo#750440).
+ Remove gettext .pot file hack (bgo#743574).
+ Be more careful about integer overflow (bgo#752297).
+ Updated translations.
- Drop README from docs as it is now empty.
- Add generic www.gnome.org URL to silence a few lint warnings.
- Update to version 2.31.4:
+ SVGZ icons in notification GNOME3 (bgo#648815).
+ gdk_pixbuf_apply_embedded_orientation is not working
(bgo#725582).
+ Updated translations.
- Update to version 2.31.3:
+ API changes: Revert an annotation change that broke bindings.
+ Build fixes:
- Clean up configure
- Fix Visual Studio build
- Define MAP_ANONYMOUS when needed
- Include gi18n-lib.h where needed
+ Updated translations.
- Update to version 2.31.2:
+ API changes:
- Deprecate GdkPixdata.
- Add gdk_pixbuf_get_options() helper to list set options.
- Annotations fixes for various functions.
- Remove incorrect info about area-prepared signal.
+ Image format support changes:
- Flag multi-page TIFF files.
- Fix memory usage for GIF animations, add note about minimum
frame length.
- Return an error for truncated PNG files.
- Add density (DPI) support for JPEG, PNG and TIFF.
- Fix reading CMYK JPEG files generated by Photoshop.
- Allow saving 1-bit mono TIFF files as used in faxes.
- Simplify loader names.
- Fix loading GIF files when the first write is short.
- Add progressive loading to ICNS files.
- Add support for 256x256 ICO files.
- Fix reading MS AMCap2 BMP files.
+ Other:
- Honour requested depth in Xlib.
- Special-case compositing/copying with no scaling.
- Add relocation support to OSX and Linux.
- Prefer gdk-pixbuf's loaders to the GDI+ ones on Windows.
- fix bashism in post script