[network-manager-applet] libnm-gtk/cert-chooser: add a missing include

[Lubomir Rintel <lkundrak src gnome org>]

commit b215e92d95db690af16967c9911bb991729da2b1
Author: Lubomir Rintel <lkundrak v3 sk>
Date:   Mon Oct 16 12:42:12 2017 +0200

    libnm-gtk/cert-chooser: add a missing include
    
    When building the introspection data, the autotools-based build ordered the
    headers in a way this got included in a way that worked. Not the case with
    meson anymore.

 src/libnm-gtk/nm-cert-chooser.h |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/libnm-gtk/nm-cert-chooser.h b/src/libnm-gtk/nm-cert-chooser.h
index 824c9b6..b5854f8 100644
--- a/src/libnm-gtk/nm-cert-chooser.h
+++ b/src/libnm-gtk/nm-cert-chooser.h
@@ -25,6 +25,7 @@
 
 #include <gtk/gtk.h>
 #include <NetworkManager.h>
+#include <nm-connection.h>
 
 G_BEGIN_DECLS