git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@8166 c06c8d41-db1a-0410-9941-cceddc491573
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// Trapdoor spiders only unsubmerge when their foe is in sight if
// the foe is right next to them.
if (mon->type == MONS_TRAPDOOR_SPIDER)
// Lurking monsters only unsubmerge when their foe is in sight if the foe
// is right next to them.
if (mons_is_lurking(mon))