MINOR: hlua/event_hdl: fix return type for hlua_event_hdl_cb_data_push_args

Changing hlua_event_hdl_cb_data_push_args() return type to void since it
does not return anything useful.
Also changing its name to hlua_event_hdl_cb_push_args() since it does more
than just pushing cb data argument (it also handles event type and mgmt).

Errors catched by the function are reported as lua errors.
1 file changed