[anjuta] build: add support for libvala-0.22

[Sebastien Granjoux <sgranjoux src gnome org>]

commit 4c8a7c8e75866651ec1744a35b865b6be6367870
Author: Dominique Leuenberger <dimstar opensuse org>
Date:   Tue Aug 6 11:17:45 2013 +0200

    build: add support for libvala-0.22
    
    To make maintenance a little bit easier in the future, rewrite the
    detection to use foreach instead of nesting the checks.

 configure.ac |    8 +++-----
 1 files changed, 3 insertions(+), 5 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index a2d56f4..418f236 100644
--- a/configure.ac
+++ b/configure.ac
@@ -317,11 +317,9 @@ if test "$user_disabled_vala" = 1; then
 else
         AC_MSG_RESULT(no)
        AC_MSG_CHECKING(if libvala is available)
-       PKG_CHECK_EXISTS([ libvala-0.20 ],
-                        [ valaver="-0.20" ],
-                        [ PKG_CHECK_EXISTS([ libvala-0.18 ],
-                                           [ valaver="-0.18" ],
-                                           [ valaver="" ])
+       m4_foreach([VERSION], [[0.18], [0.20], [0.22]],
+               [PKG_CHECK_EXISTS([ libvala-VERSION ],
+                        [ valaver="-VERSION" ])
                         ])
        if test "x$valaver" != "x"; then
                AC_MSG_RESULT(yes)