luaobject: add export property macro

Signed-off-by: Julien Danjou <julien@danjou.info>

common/luaobject.h

@@ -159,6 +159,13 @@ int luaA_object_emit_signal_simple(lua_State *);
         return p;                                                              \
     }
 
+#define OBJECT_EXPORT_PROPERTY(pfx, type, field) \
+    fieldtypeof(type, field) \
+    pfx##_get_##field(type *object) \
+    { \
+        return object->field; \
+    }
+
 #define LUA_OBJECT_EXPORT_PROPERTY(pfx, type, field, pusher) \
     static int \
     luaA_##pfx##_get_##field(lua_State *L, type *object) \