info: Do not crash if Renderer is not set by SessionManager

This regression has been introduced by commit 52da4da. The
info panel crashes if prettify_info() returns NULL. This happens
if Renderer property from SessionManager is empty.

https://bugzilla.gnome.org/show_bug.cgi?id=774240

Gbp-Pq: Name info-Do-not-crash-if-Renderer-is-not-set-by-SessionM.patch

_polkit_wheel_sudo_group

Gbp-Pq: Name 07_polkit_wheel_sudo_group.patch

_handle_passwd_with_ldap

Gbp-Pq: Name 06_handle_passwd_with_ldap.patch

_menu_category

Gbp-Pq: Name 01_menu_category.patch

gnome-control-center (1:3.22.2-3) unstable; urgency=medium

  * Add debian/patches/git_allow_empty_ip4_gateway.patch
    - Allow entering manual ipv4 configuration *without* a gateway.
      (Cherry-picked from upstream commit 898d0aa4e9780078ff3)
Closes: #863595 (see also bgo: #708500)
[dgit import unpatched gnome-control-center 1:3.22.2-3]

Import gnome-control-center_3.22.2-3.debian.tar.xz

[dgit import tarball gnome-control-center 1:3.22.2-3 gnome-control-center_3.22.2-3.debian.tar.xz]

Import gnome-control-center_3.22.2.orig.tar.xz

[dgit import orig gnome-control-center_3.22.2.orig.tar.xz]