[gtk] (12 commits) ...Merge branch 'win32-enable-werror' into 'master'

[Benjamin Otte <otte src gnome org>]

Summary of changes:

  1793546... win32: Remove unused variables (*)
  0877b29... win32: Actually pass y variable for y parameter (*)
  9521af0... window: Remove unneeded variable (*)
  4f0cc30... win32: Rename a shadowing variable (*)
  3ace1f5... imcontextime: Remove unused variables (*)
  b36b932... win32: Add missing enum value to switch statement (*)
  ca2bffc... imcontextime: Add missing semicolon (*)
  5273634... tests: Use g_free(), not free() (*)
  143bba0... win32: Remove outdated workaround (*)
  fc9f4ad... win32: Enable --werror in CI (*)
  e197752... win32: Fix meson names for defines (*)
  9f739ab... Merge branch 'win32-enable-werror' into 'master'

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