[glib] (19 commits) Non-fast-forward update to branch gobject-speedups4

[Matthias Clasen <matthiasc src gnome org>]

The branch 'gobject-speedups4' 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:

  b99bb30... Keep a separate flag for notify handlers
  a0537e3... Avoid property notification during object construction
  6d6e231... Avoid property notification during g_object_set
  45e1aed... gobject: Speed up property lookup

Commits added to the branch:

  9d7d439... Avoid g_param_spec_get_redirect_target (*)
  16a8b6d... gobject: Avoid redundant atomics (*)
  7d8e2fc... Cosmetic coding style fixes (*)
  54c867a... Revert "gtype: Speed up type checks for final types" (*)
  14f4b38... tests: NULL-initialise some variables to help scan-build (*)
  423bcab... garray: Change free/unref semantics under static analysis (*)
  504727c... gvariant: Zero-initialise GVariantBuilder children under st (*)
  6c0bde8... tests: Fix a scan-build warning about uninitialised threads (*)
  9926703... tests: Avoid an uninitialised variable warning in slice-mem (*)
  8f7df34... gobject: Sink floating pspecs if adding them to a class fai (*)
  63974fa... Merge branch 'coverity-pspecs' into 'main' (*)
  5de59d3... Merge branch 'static-analysis-fixes' into 'main' (*)
  b1e3710... Merge branch 'gobject-speedup8' into 'main' (*)
  3076c60... Merge branch 'gobject-speedup10' into 'main' (*)
  18a7b19... Merge branch 'revert-final-type-check' into 'main' (*)
  e1b0409... Keep a separate flag for notify handlers
  c641cbb... Avoid property notification during object construction
  48fce3b... Avoid property notification during g_object_set
  713fb45... gobject: Speed up property lookup

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