[gdk-pixbuf] (25 commits) Non-fast-forward update to branch issue-152

[Emmanuele Bassi <ebassi src gnome org>]

The branch 'issue-152' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  59de8cb... Remove the libjasper-based JPEG2000 loader

Commits added to the branch:

  b22723c... Visual Studio builds: use -utf-8 if available (*)
  37ab8e5... Fix exit status of gen-resources.py (*)
  35dcd72... JPEG: skip bytes during incremental load (*)
  e3adcf0... tests: Skip GIF test when the format is not supported (*)
  19eed7d... tests: Skip tests when the ref format is unsupported (*)
  15cd65a... tests: Skip composite test when PNG is unsupported (*)
  7f0b214... tests: Conditionally build and run tests (*)
  f57bec3... Define _XOPEN_SOURCE properly on SunOS (*)
  cfdf6d3... tests: Add test file for issue 70 (*)
  fc0590f... tests: Add test for issue 70 (*)
  1f390c5... pixdata: Bail out if the error is set (*)
  086e8ad... Check the memset length argument (*)
  dd3aa9e... GIF: Plug animation data and iterator leak (*)
  0130527... build: Bump _XOPEN_SOURCE to 700 (*)
  ae58241... CI: Switch to the new win32 runners (*)
  a82e78f... tests: check for mmap failure (*)
  3756f7b... io-bmp.c: Fix building on older compilers (*)
  7ebedf3... XBM: Fix signed integer overflow. (*)
  c22494b... XPM: Fix undefined behaviour (*)
  1479726... docs: Move the core data section to the source file (*)
  716158e... Add `gtk_doc` build option (*)
  c7eada6... ci: Build and deploy the API reference (*)
  679e9ed... pixops: Avoid division during alpha scaling (*)
  79798c0... docs: Update the option used to generate the API reference (*)
  4a278c6... Remove the libjasper-based JPEG2000 loader

(*) This commit already existed in another branch; no separate mail sent