Fix 1971173: don't interrupt interlevel travel for monsters coming into

         view if you're already going up or down stairs.

Also, only interrupt for HP or MP being fully restored when resting.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@5250 c06c8d41-db1a-0410-9941-cceddc491573

Created by  zelgadis  on May 25, 2008
PLJI4CMQZJ773B3QFPKBM3NBDHOMKTR63TRI7IRC67LHFNOQNUHQC
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