json-glib: make some functions virtual

contrib/json-glib-1.0.vapi

@@ -324,15 +324,15 @@ namespace Json {
 		public Json.Node default_serialize_property (string property_name, GLib.Value value, GLib.ParamSpec pspec);
 		public abstract bool deserialize_property (string property_name, out GLib.Value value, GLib.ParamSpec pspec, Json.Node property_node);
 		[Version (since = "0.14")]
-		public abstract unowned GLib.ParamSpec? find_property (string name);
+		public virtual unowned GLib.ParamSpec? find_property (string name);
 		[Version (since = "0.14")]
-		public abstract GLib.Value get_property (GLib.ParamSpec pspec);
+		public virtual GLib.Value get_property (GLib.ParamSpec pspec);
 		[CCode (array_length_pos = 0.1, array_length_type = "guint")]
 		[Version (since = "0.14")]
 		public (unowned GLib.ParamSpec)[] list_properties ();
 		public abstract Json.Node serialize_property (string property_name, GLib.Value value, GLib.ParamSpec pspec);
 		[Version (since = "0.14")]
-		public abstract void set_property (GLib.ParamSpec pspec, GLib.Value value);
+		public virtual void set_property (GLib.ParamSpec pspec, GLib.Value value);
 	}
 	[CCode (cheader_filename = "json-glib/json-glib.h", has_type_id = false)]
 	[Version (since = "1.2")]

contrib/meson.build

@@ -8,3 +8,5 @@ bayes_glib = files([
 
 bayes_glib_args = ['--vapidir=' + meson.current_source_dir(), '--pkg=bayes-glib-1.0']
 bayes_glib_inc = include_directories('bayes-glib/src')
+
+json_glib_local_args = ['--vapidir=' + meson.current_source_dir()]

meson.build

@@ -29,7 +29,7 @@ subdir('src')
 executable('vaccine',
             [src, res, bayes_glib],
             dependencies: deps,
-            vala_args: [res_args, bayes_glib_args],
+            vala_args: [res_args, bayes_glib_args, json_glib_local_args],
             include_directories: [config_inc, bayes_glib_inc],
             c_args: '-w',
             install: true)