[gnome-panel] build: use stable version in gtk-doc check

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 064c2984f409d0ef80cf4143f57cf6cfd695d945
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Tue Mar 22 11:21:36 2016 +0200

    build: use stable version in gtk-doc check

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 24fbf01..1cd826f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -255,7 +255,7 @@ AM_GLIB_GNU_GETTEXT
 
 dnl gtk-doc stuff
 
-GTK_DOC_CHECK([1.24.1], [--flavour no-tmpl])
+GTK_DOC_CHECK([1.25], [--flavour no-tmpl])
 
 dnl yelp-tools stuff