[grilo-plugins] lua-factory: Fix build when grlnet or json-glib is missing

[Bastien Nocera <hadess src gnome org>]

commit 0fbae60b0825616caa2c7100d4f9ca06278121c9
Author: Bastien Nocera <hadess hadess net>
Date:   Wed Apr 9 16:46:32 2014 +0200

    lua-factory: Fix build when grlnet or json-glib is missing
    
    https://bugzilla.gnome.org/show_bug.cgi?id=727901

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 1625f54..bd4ee14 100644
--- a/configure.ac
+++ b/configure.ac
@@ -855,7 +855,7 @@ AC_ARG_ENABLE(lua_factory,
                 esac
         ],
         [
-                if test "x$HAVE_LUA" = "xyes"; then
+                if test "x$HAVE_LUA" = "xyes" -a "x$HAVE_GRLNET" = "xyes" -a "x$HAVE_JSON_GLIB" = "xyes"; 
then
                   enable_lua_factory=yes
                 else
                   enable_lua_factory=no