[gtk] (5 commits) Non-fast-forward update to branch wip/otte/center-center-center

[Benjamin Otte <otte src gnome org>]

The branch 'wip/otte/center-center-center' 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:

  2222b47... build: Make sure ifuncs exist when using fp16
  33af969... reftests: Don't crash if no node
  56b623e... widget: adjust allocation even better
  af08def... testsuite: Add lots of reftests for picture sizing

Commits added to the branch:

  3c9c7a0... build: Make sure ifuncs exist when using fp16
  b912e84... gl: Call make_current() before doing any GL work
  438bf85... reftests: Don't crash if no node
  1606a41... widget: adjust allocation even better
  2113a18... testsuite: Add lots of reftests for picture sizing