[babl] Created tag BABL_0_1_52

[Øyvind "pippin" Kolås <ok src gnome org>]

The unsigned tag 'BABL_0_1_52' was created.

Tagger: Øyvind Kolås <pippin gimp org>
Date: 1530539050 +0200

    0.1.52

Changes since the last tag 'BABL_0_1_50':

Ell (7):
      babl-palette: make default palette initialization thread-safe
      babl-palette: fix default-palette radii array size
      babl-memory: allow babl_malloc(0) to succeed
      babl-palette: warn when trying to create a 0-color palette
      babl-fish: fix concurrent babl_fish()/process() calls with palette formats
      babl-palette: warn when trying to create a palette with > 256 colors
      babl-palette: fix default palette double-data size

Elle Stone (1):
      babl: fix fixed to double conversions

Øyvind Kolås (14):
      post release version bump
      babl-space: babl_space_new_from_chromaticities add equalize_matrix argument
      babl: rename functions that used to refer to specific gamma
      babl: remove outdated comment
      babl: clarify internal gray babl-id enums
      babl: add R~G~B~ color models and pixel formats
      babl: add ~ variants to gray color models
      babl: refactor format registration to loop over types
      tests: add format_with_space test
      babl: predefine ACEScg and ACES2065-1 BablSpaces
      babl: fix trc registrationof ACES spaces
      NEWS: update
      export-symbols: export babl_trc
      release 0.1.52