misc: unref bus at the end of cleanup
The g_object_run_dispose needs bus as below.
g_object_run_dispose > atspi_application_dispose > _atspi_bus
So close, unref and set bus to NULL after using bus is done.
The g_object_run_dispose needs bus as below.
g_object_run_dispose > atspi_application_dispose > _atspi_bus
So close, unref and set bus to NULL after using bus is done.