[gtk] (12 commits) ...Merge branch 'pvs-fixes' into 'master'

[Matthias Clasen <matthiasc src gnome org>]

Summary of changes:

  3c15fa9... vulkan: Fix image uploading by regions (*)
  3f28399... css: Fix border value parsing (*)
  c71c891... listbase: Don't specify the same thing twice (*)
  041f410... textbtree: Avoid line vs char count confusion (*)
  927fdb9... x11: A case of argument order confusion (*)
  e91e751... composetable: Remove a redundant check (*)
  1e0ea21... messagedialog: Don't initialize twice (*)
  0eba833... gdk: Remove a redundant check (*)
  aa5bd38... a11y: Avoid out-of-bounds access (*)
  b5200bd... css: Drop a bit of unreachable code (*)
  2f42e1f... treemodelfilter: Drop unreachable code (*)
  5c53210... Merge branch 'pvs-fixes' into 'master'

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