[tracker] Fixes GB#610318, Bump GTK+ dep to 2.18 due to gtk_widget_set_can_default()

[Martyn James Russell <mr src gnome org>]

commit 4d45203219769ccbd7ed22103b5fa4459124c967
Author: Martyn Russell <martyn lanedo com>
Date:   Thu Feb 18 10:58:45 2010 +0000

    Fixes GB#610318, Bump GTK+ dep to 2.18 due to gtk_widget_set_can_default()

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index c18254d..bef92b9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -134,7 +134,7 @@ DBUS_REQUIRED=1.0
 DBUS_GLIB_REQUIRED=0.78
 GLIB_REQUIRED=2.20.0
 PANGO_REQUIRED=1.0.0
-GTK_REQUIRED=2.16.0
+GTK_REQUIRED=2.18.0
 LIBXML2_REQUIRED=2.6
 LIBNOTIFY_REQUIRED=0.4.3
 HAL_REQUIRED=0.5