mod_slotmem_shm: follow up to r1830800, preserve callee API.
The caller might (and actually balancer_child_init() does) rely on
slotmem_attach() to not mangle the passed in/out slotmem pointer on
failure.
[Reverted by r1831868]
@@ -586,7 +586,6 @@ static apr_status_t slotmem_attach(ap_slotmem_instance_t **new,
apr_shm_t *shm;
apr_status_t rv;
- *new = NULL;
ap_mpm_query(AP_MPMQ_GENERATION, &generation);
if (!slotmem_filenames(pool, name, &fname, NULL)) {
