base-client: fix potential uninitialized variable bug
contact-list: don't crash if 'd' is NULL

https://bugs.freedesktop.org/show_bug.cgi?id=79006
account-request: remove useless 'priv' variable

https://bugs.freedesktop.org/show_bug.cgi?id=79006
test-connection-error: don't check errors twice

We are already using g_assert_error() to check those.

https://bugs.freedesktop.org/show_bug.cgi?id=79006
Merge branch 'telepathy-glib-0.24'