[gnome-themes-standard] build: bump GTK+ required version

[Cosimo Cecchi <cosimoc src gnome org>]

commit 5fd6c56b24903185e61d52b9dcba62deba7cce6e
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Tue Sep 6 15:13:47 2011 -0400

    build: bump GTK+ required version
    
    3.1.18 is now required for pathbar theming and GtkThemingEngine's
    gtk_render_line() implementation which we rely upon now.

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 5c06e46..e45485c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -28,7 +28,7 @@ AC_SUBST(GETTEXT_PACKAGE)
 AC_DEFINE_UNQUOTED([GETTEXT_PACKAGE],["$GETTEXT_PACKAGE"],[Gettext package])
 AM_GLIB_GNU_GETTEXT
 
-PKG_CHECK_MODULES(GTK, gtk+-3.0 >= 3.1.11 librsvg-2.0,,
+PKG_CHECK_MODULES(GTK, gtk+-3.0 >= 3.1.18 librsvg-2.0,,
                   AC_MSG_ERROR([GTK+-3.0 is required to compile gnome-themes-standard]))
 
 AC_SUBST(GTK_CFLAGS)