[nautilus] build: bump GTK requirement

[Cosimo Cecchi <cosimoc src gnome org>]

commit 523ea0c4bc628197cfd20f38ebd5f6fc99b737a0
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Mon Jun 17 16:45:32 2013 -0700

    build: bump GTK requirement
    
    For GtkPlacesSidebar.

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index f6a28be..72b9e50 100644
--- a/configure.ac
+++ b/configure.ac
@@ -5,7 +5,7 @@ dnl ===========================================================================
 m4_define(glib_minver,                 2.35.3)
 m4_define(gnome_desktop_minver,        3.0.0)
 m4_define(pango_minver,                1.28.3)
-m4_define(gtk_minver,                  3.7.7)
+m4_define(gtk_minver,                  3.9.3)
 m4_define(xml_minver,                  2.7.8)
 m4_define(exif_minver,                 0.6.20)
 m4_define(exempi_minver,               2.1.0)