gobject: Allow install_properties with 1 GParamSpec
`g_object_install_properties()` can be used to install multiple
properties at once, _and_ to allow an optimization for property
notification. Arguably, using it over `g_object_install_property()` is
best practice. That being said, you can't use it if you have only a
single property that is installed (yet), due to a precondition check for
more than 1 pspecs.
diff --git a/gobject/gobject.c b/gobject/gobject.c
index df27c36..e470c68 100644
--- a/gobject/gobject.c
+++ b/gobject/gobject.c
@@ -729,7 +729,7 @@
gint i;
g_return_if_fail (G_IS_OBJECT_CLASS (oclass));
- g_return_if_fail (n_pspecs > 1);
+ g_return_if_fail (n_pspecs >= 1);
g_return_if_fail (pspecs[0] == NULL);
if (CLASS_HAS_DERIVED_CLASS (oclass))
