[gtk] (21 commits) ...Merge branch 'wip/baedert/for-master' into 'master'

[Matthias Clasen <matthiasc src gnome org>]

Summary of changes:

  3a1e019... print-editor: Fix a wrong comparison (*)
  c7dbb8e... label: Plug a potential memory leak (*)
  0dae1f4... listbox test: Only compare values for rows we have (*)
  af97f19... textview: Respect return value of get_text_surface_coords() (*)
  a2291fb... showrendernode: Pass error to deserialize() (*)
  3db5e15... filechooserwidget: gtk_widget_get_root() can return NULL (*)
  f6ebc06... filechooserwidget: Avoid an uninitialized value (*)
  56e89e8... demos: Remove a dead assignment (*)
  b166453... gdksurface: Ensure some assumptions (*)
  44728d0... stack: assert for some assumptions (*)
  41ef1d8... atspicontext: Add a few missing break statements (*)
  6dcdb4a... atspitextbuffer: Explicitly cast between pango and gtk enum (*)
  d97cb85... textview: Remove a broken debug output statement (*)
  85702f8... dnd demo: Make the transform code a bit more idiomatic (*)
  98e88b7... text: Avoid a crash (*)
  85d4b86... text: Fold focus_{in,out} into only caller (*)
  1bf79a4... text: Fix a documentation mishap (*)
  ff1fb4f... text: Remove empty root() implementation (*)
  b6a843a... gl renderer: Fix two scale_x/y mixups (*)
  9109dee... gl renderer: Don't use blur node bounds (*)
  d5b9489... Merge branch 'wip/baedert/for-master' into 'master'

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