[libmediaart] build: Don't fail if vapigen isn't available

[Martyn James Russell <mr src gnome org>]

commit 47e4d021438857227f5b2cd98bc730ccaac5bd2b
Author: Martyn Russell <martyn lanedo com>
Date:   Fri Mar 7 09:19:50 2014 +0000

    build: Don't fail if vapigen isn't available

 configure.ac |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 792cfd3..63534f2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -184,8 +184,13 @@ AM_CONDITIONAL([ENABLE_GTK_DOC], false)
 
 GOBJECT_INTROSPECTION_CHECK([1.30.0])
 
+m4_ifdef([VAPIGEN_CHECK], [
 # Vala bindings
 VAPIGEN_CHECK([0.16])
+],
+[
+AM_CONDITIONAL([ENABLE_VAPIGEN], false)
+])
 
 ##################################################################
 # Check for GdkPixbuf for MP3 album art