[gnome-boxes] Require Vala >= 0.21.1

[Zeeshan Ali Khattak <zeeshanak src gnome org>]

commit 9a72df6ad1c7980ad39d2b81788df387e18b6843
Author: Zeeshan Ali (Khattak) <zeeshanak gnome org>
Date:   Sun Jun 16 17:50:57 2013 +0200

    Require Vala >= 0.21.1
    
    https://bugzilla.gnome.org/show_bug.cgi?id=698127

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index a9e2e2d..05508d9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -125,7 +125,7 @@ else
 fi
 AM_CONDITIONAL([HAVE_OVIRT], [test "x$have_govirt" = "xyes"])
 
-VALA_CHECK([0.18.0], [
+VALA_CHECK([0.21.1], [
   clutter-gtk-1.0
   cogl-1.0
   gdk-pixbuf-2.0