[anjuta] build: detect vala 0.28 branch

[Sebastien Granjoux <sgranjoux src gnome org>]

commit 8c337455533e9a57102bd590dc5bfee111110241
Author: Dominique Leuenberger <dimstar opensuse org>
Date:   Thu Feb 5 13:50:55 2015 +0100

    build: detect vala 0.28 branch
    
    https://bugzilla.gnome.org/show_bug.cgi?id=744041

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index d109e47..ec62cf6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -329,7 +329,7 @@ if test "$user_disabled_vala" = 1; then
 else
         AC_MSG_RESULT(no)
        AC_MSG_CHECKING(if libvala is available)
-       m4_foreach([VERSION], [[0.18], [0.20], [0.22], [0.24], [0.26]],
+       m4_foreach([VERSION], [[0.18], [0.20], [0.22], [0.24], [0.26], [0.28]],
                [PKG_CHECK_EXISTS([ libvala-VERSION ],
                         [ valaver="-VERSION" ])
                         ])