Warnings are shown due to dbus_pending_call_steal_reply()

[Manuel de la Peña]

The following messages are shown in the execution of the location service related to dbus-cpp:

Instantiating and configuring: gps::Provider
Instantiating and configuring: remote::Provider
Attempted to unregister path (path[0] = sessions path[1] = 0) which isn't registered
Attempted to unregister path (path[0] = sessions path[1] = 2) which isn't registered
Attempted to unregister path (path[0] = sessions path[1] = 1) which isn't registered
process 3061: arguments to dbus_pending_call_steal_reply() were incorrect, assertion "pending->reply != NULL" failed in file ../../dbus/dbus-pending-call.c line 715.
This is normally a bug in some application using the D-Bus library.