[gupnp-dlna/wip/new-api] Bump vapigen requirement

[Jens Georg <jensgeorg src gnome org>]

commit a3679dff70b17c02912ca208cf0fa68edb155da8
Author: Jens Georg <mail jensge org>
Date:   Wed Jan 16 13:07:30 2013 +0100

    Bump vapigen requirement
    
    We need at least 0.18 for the gstreamer-1.0 vapis.

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 6cad47d..741669e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -182,7 +182,7 @@ GOBJECT_INTROSPECTION_CHECK([0.6.4])
 # vapigen
 AS_IF([test "x$found_introspection" = "xyes"],
       [
-       VALA_PROG_VAPIGEN([0.14])
+       VALA_PROG_VAPIGEN([0.18])
       ]
 )
 AM_CONDITIONAL([HAVE_VAPIGEN], [test "x$VAPIGEN" != "x"])