[gitg] Depend on vala 0.16

[Jesse van den Kieboom <jessevdk src gnome org>]

commit 2985caba4f0a8ce8e09e1df7ae719818c45468e6
Author: Jesse van den Kieboom <jesse vandenkieboom epfl ch>
Date:   Tue Oct 30 11:06:18 2012 +0100

    Depend on vala 0.16

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 00fddc2..33f892d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -37,7 +37,7 @@ AC_PROG_MAKE_SET
 AC_PATH_PROG(GZIP, gzip)
 
 AM_PATH_PYTHON
-AM_PROG_VALAC
+AM_PROG_VALAC([0.16.0])
 
 AC_PATH_PROG(GLIB_MKENUMS, glib-mkenums)
 AC_PATH_PROG(GLIB_COMPILE_RESOURCES, glib-compile-resources)