[epiphany/gnome-2-30] configure.ac: update required GTK+ version

[Diego Escalante Urrelo <diegoe src gnome org>]

commit 5eee40749fb1738bcd2ada840f039ff4bd3bc8ab
Author: Xan Lopez <xan gnome org>
Date:   Sun Jun 13 00:16:28 2010 +0300

    configure.ac: update required GTK+ version

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index b405ae0..15a0f1b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -94,7 +94,7 @@ if test "$enable_maintainer_mode" = "yes"; then
 fi
 
 GLIB_REQUIRED=2.19.7
-GTK_REQUIRED=2.19.5
+GTK_REQUIRED=2.21.2
 LIBXML_REQUIRED=2.6.12
 LIBXSLT_REQUIRED=1.1.7
 LIBSTARTUP_NOTIFICATION_REQUIRED=0.5