[gnome-chess] Depend on unreleased Vala

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 2337f7455696e2d350c9e3dcd18ff241da2f77fe
Author: Michael Catanzaro <mike catanzaro gmail com>
Date:   Sun Jul 14 22:36:23 2013 -0500

    Depend on unreleased Vala
    
    The Cairo.Matrix.get_matrix () binding changed this cycle. Yay!
    
    https://bugzilla.gnome.org/show_bug.cgi?id=703837

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index f1bcf5b..450976d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -6,7 +6,7 @@ AM_SILENT_RULES([yes])
 AM_MAINTAINER_MODE([enable])
 GNOME_MAINTAINER_MODE_DEFINES
 
-AM_PROG_VALAC([0.16.0])
+AM_PROG_VALAC([0.20.99])
 AM_PROG_CC_C_O
 
 GLIB_GSETTINGS