[gimp] (2 commits) Non-fast-forward update to branch wip/Jehan/issue-3265-png-gama-chunk

[Jehan <jehanp src gnome org>]

The branch 'wip/Jehan/issue-3265-png-gama-chunk' 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:

  89306e1... Issue #3265: PNG gAMA chunk is silently ignored.
  b92ca16... plug-ins: fix plugin-defs for file-heif.

Commits added to the branch:

  07a3734... plug-ins: fix plugin-defs for file-heif. (*)
  01c7b78... Issue #3265: PNG gAMA chunk is silently ignored.

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