[gnome-games] configure.ac: bump Vala depend

[Ryan Lortie <ryanl src gnome org>]

commit e8f751036264c05cba8b094f710d4099503cdd01
Author: Ryan Lortie <desrt desrt ca>
Date:   Fri Feb 3 11:17:34 2012 -0500

    configure.ac: bump Vala depend
    
    May as well make this official...

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index e3b0a41..4077eba 100644
--- a/configure.ac
+++ b/configure.ac
@@ -181,7 +181,7 @@ AC_PROG_LN_S
 AC_PROG_SED
 
 if test "$need_vala" = "yes"; then
-  AM_PROG_VALAC([0.13.0])
+  AM_PROG_VALAC([0.15.1])
 fi
 
 AM_PROG_CC_C_O