Please describe the problem:
An Object with a property of type int64 generates property code that uses g_param_spec_pointer instead of g_param_spec_int64.

Steps to reproduce:
using GLib;

public class Test.Object: GLib.Object {
        public int64 id {
                get;
                set;
        }

        static void main (string[] args) {}
}

valac -C test.vala

Actual results:
g_object_class_install_property (G_OBJECT_CLASS (klass), TEST_OBJECT_ID, g_param_spec_pointer ("id", "id", "id", G_PARAM_STATIC_NAME | G_PARAM_STATIC_NICK | G_PARAM_STATIC_BLURB | G_PARAM_READABLE | G_PARAM_WRITABLE));

Expected results:
g_object_class_install_property (G_OBJECT_CLASS (klass), TEST_OBJECT_ID, g_param_spec_int64 ("id", "id", "id", G_MININT64, G_MAXINT64, 0 G_PARAM_STATIC_NAME | G_PARAM_STATIC_NICK | G_PARAM_STATIC_BLURB | G_PARAM_READABLE | G_PARAM_WRITABLE));

Does this happen every time?
Yes

Other information: