actually needed.
git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@4940 c06c8d41-db1a-0410-9941-cceddc491573
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// If revitalisation has succeeded, and it hasn't succeeded as far
// as possible, turn on revitalisation chaining for several turns.
if (success && step != step_max)
// If revitalisation has succeeded, it hasn't succeeded as far
// as possible, and revitalisation chaining is needed, turn on
// revitalisation chaining for several turns.
if (success && step != step_max && need_chain)