base-connection: return from RequestHandles if called with no names
base-connection: return from RequestHandles if called with no names

Since we added async handle normalization functions, RequestHandles(1, [])
would just not return at all.

Signed-off-by: Jonny Lamb <3d1fb3642aaab2ff70e3392a5ab916bf99eed6a3@collabora.co.uk>

Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib