[swell-foop] Depend on Vala 0.23

[Michael Catanzaro <mcatanzaro src gnome org>]

commit fb3fa09536c978e6d244db737abd2c0ff44abfb0
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Sun Dec 8 11:10:18 2013 -0600

    Depend on Vala 0.23
    
    For GTK+ 3.11.2 API
    
    https://bugzilla.gnome.org/show_bug.cgi?id=720034

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 7e3dbfa..e53c827 100644
--- a/configure.ac
+++ b/configure.ac
@@ -4,7 +4,7 @@ AM_SILENT_RULES([yes])
 AM_MAINTAINER_MODE
 GNOME_MAINTAINER_MODE_DEFINES
 
-AM_PROG_VALAC([0.16.0])
+AM_PROG_VALAC([0.23.0])
 AM_PROG_CC_C_O
 
 GLIB_GSETTINGS