[gtk] (11 commits) ...spinbutton: Fold function into only caller

[Timm Bäder <baedert src gnome org>]

Summary of changes:

  7d7045b... widget: Remove some unneeded prototypes (*)
  dc1612b... contentsformat: Avoid a GPtrArray (*)
  fef4f07... textview: Use content size when validating contents (*)
  9449341... filechooserwidget: Make the location entry hexpand (*)
  c7294ab... button: Remove priv pointer (*)
  a9cd2d8... widget: Simplify set_style_context (*)
  354eab7... entry: Allocate icons at full height (*)
  9db76ce... entry: Check gdk_event_get_coords return value (*)
  67258c6... checkbutton: Don't reorder non-existent indicator widget (*)
  7c59ac2... spinbutton: Remove unused macro
  83c74ff... spinbutton: Fold function into only caller

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