(Bug 46930) changeTitle only create redirect where redirid > 0

changeTitle would create always a redirect entry even though
Title:moveTo() explicitly sets createRedirect to false but changeTitle
never checked redirid therefore smw_fpt_redi conatins gost redirects
for pages that did not any expect redirects and already deleted
(Special:MovePage - > Leave a redirect behind unchecked)

Change-Id: Ibad8cd133cc985656346769787698a8519f5e58e
Merge "(Bug 46930) changeTitle only create redirect where redirid > 0"