[gtk+] meson: Add missing source file

[Emmanuele Bassi <ebassi src gnome org>]

commit 1b60361b4a34f67027de7d3a9873e1dd61dc609a
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Tue Jul 18 22:50:57 2017 +0100

    meson: Add missing source file
    
    The newly added gtkfilechoosererrorstack.c source needs to be included
    in the Meson build as well as the Autotools one.

 gtk/meson.build |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gtk/meson.build b/gtk/meson.build
index a265509..c9151d3 100644
--- a/gtk/meson.build
+++ b/gtk/meson.build
@@ -157,6 +157,7 @@ gtk_public_sources = files([
   'gtkfilechooserdialog.c',
   'gtkfilechooserembed.c',
   'gtkfilechooserentry.c',
+  'gtkfilechoosererrorstack.c',
   'gtkfilechoosernative.c',
   'gtkfilechoosernativeportal.c',
   'gtkfilechooserutils.c',