[california] Verify valac installed and min version: Closes bgo#727238

[Jim Nelson <jnelson src gnome org>]

commit 98088b4d28349e32ea7f06931937ab330d3c9eb7
Author: Jim Nelson <jim yorba org>
Date:   Fri Mar 28 18:53:33 2014 -0700

    Verify valac installed and min version: Closes bgo#727238

 configure.ac |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index c16a8ab..487d82d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -12,6 +12,7 @@ AM_PROG_CC_C_O
 
 AC_PATH_PROG(VALAC, valac, valac)
 AC_SUBST(VALAC)
+AM_PROG_VALAC(0.22.1)
 
 AC_PATH_PROG(GLIB_COMPILE_RESOURCES, glib-compile-resources)