screensaver-proxy: Check return value of g_dbus_connection_register_object()

Submitted by David King `@davidk`

Description

As noticed by Bastien in bug 692771, comment 20, some uses of g_dbus_connection_register_object() do not check the return value, where 0 indicates an error. The screensaver-proxy plugin is one such example:

plugins/screensaver-proxy/gsd-screensaver-proxy-manager.c:266

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screensaver-proxy: Check return value of g_dbus_connection_register_object()

Submitted by David King @davidk

Description

Submitted by David King `@davidk`