[geary] Require Vala 0.22.1: Closes #720169

[Jim Nelson <jnelson src gnome org>]

commit 81fe5b35bde407397b8f93772a122d28bff007b0
Author: Jim Nelson <jim yorba org>
Date:   Tue Dec 10 12:22:28 2013 -0800

    Require Vala 0.22.1: Closes #720169
    
    Older versions of Vala produce an incorrect method signature when
    a ref to a null-terminated array of unowned strings is passed to
    a virtual method (i.e. Gtk.Application.local_command_line()).

 src/CMakeLists.txt |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 9f8278a..bfc9c5d 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -392,7 +392,7 @@ dbusservice/main.vala
 # Vala
 find_package(Vala REQUIRED)
 include(ValaVersion)
-ensure_vala_version("0.20.1" MINIMUM)
+ensure_vala_version("0.22.1" MINIMUM)
 include(ValaPrecompile)
 
 # Packages