Milan Bouchet-Valat authored Jun 02, 2010 and Allison Karlitskaya committed Jun 02, 2010

Add GObject introspection annotations so that the length parameter is
correctly detected for g_variant_new_strv(), g_variant_get_strv() and
g_variant_dup_strv(). Also specify that it can be a NULL pointer in
g_variant_get_strv() and g_variant_dup_strv().

For g_settings_set_strv(), detect that a NULL value is allowed, meaning
empty array.

Closes bug #620384.

Signed-off-by: Ryan Lortie <desrt@desrt.ca>