Pullup ticket #6646 - requested by nia
graphics/gdk-pixbuf2: security fix

Revisions pulled up:
- graphics/gdk-pixbuf2/Makefile                                1.53
- graphics/gdk-pixbuf2/PLIST                                    1.22
- graphics/gdk-pixbuf2/distinfo                                1.51

---
  Module Name: pkgsrc
  Committed By: nia
  Date: Sat Jun 11 12:46:06 UTC 2022

  Modified Files:
  pkgsrc/graphics/gdk-pixbuf2: Makefile PLIST distinfo

  Log Message:
  gdk-pixbuf2: update to 2.42.8

  2.42.8 (stable)
  ===

  - Clear the pixbuf's memory buffer to avoid returning uninitialized memory
  - Turn GdkPixbufModule functions into typed callbacks
  - tiff: Use non-deprecated C99 integer types
  - gif: Check for overflow when compositing or clearing frames
  - Change png/jpeg/tiff build options from boolean to feature
  - jpeg: Do not rely on UB around setjmp/longjmp
  - Build fixes
  - Documentation fixes
  - Translation updates

(bsiegert)