[PATCH] HAL runner doesn't handle D-Bus disconnect properly

[Doug Goldstein]

It appears that if the connection to D-Bus is lost or some such is lost,
HAL doesn't check the result of DBusPendingCall from
dbus_connection_send_with_reply() [1] to see if the result is not NULL
and as such an invalid case is being hit within the D-Bus API and we're
hitting a D-Bus assert and causing a crash.

Provided is a patch to see if it's NULL and handle it properly.

[1]
http://dbus.freedesktop.org/doc/dbus/api/html/group__DBusConnection.html#g8ffe6999b791b68ef959d39144632bfb
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