wapbox panic with wap-push-ppg

last patch to disable wap-push-ppg http port if its group
is not defined on conf is not finished :P

If wap_psh_ppg_init is not done, wap_push_ppg_shutdown should
be modified too.


I got a PANIC: gw/wappush_ppg.c:359: ASsertion 'run_status ==running'
failed.

if config group is not present, shouldn't the full init be disabled
instead of only half ? 

If not, if some parts could still run without the open port, could
please someone patch _shutdown function too ?