[gnome-panel] libgnome-panel: add missing G_BEGIN_DECLS

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 9739cda6b20337e59df30ed8b221062e5ef1c643
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Wed Dec 27 14:59:07 2017 +0200

    libgnome-panel: add missing G_BEGIN_DECLS

 libgnome-panel/gp-applet-info-private.h |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/libgnome-panel/gp-applet-info-private.h b/libgnome-panel/gp-applet-info-private.h
index e5ac470..5b7d95d 100644
--- a/libgnome-panel/gp-applet-info-private.h
+++ b/libgnome-panel/gp-applet-info-private.h
@@ -20,6 +20,8 @@
 
 #include "libgnome-panel/gp-applet-info.h"
 
+G_BEGIN_DECLS
+
 struct _GpAppletInfo
 {
   gchar    *name;