workaround #H4298/bz 406 - vision glitch

The entry chamber for the Fort Ludios level would be completely lit
except for one corner wall if you arrived carrying a lit candle.  The
unlit spot turns out to be correct, it is beyond candle radius, but
spots further away than that were showing up lit.  That's due to them
bordering a lit region on the opposite side and lit regions seem to
be bigger than their specified dimensions.

I tried to make the lit walls be unlit but it wasn't working.  (Making
the lit region be smaller would probably work but might have unintended
consequences when populating the zoo room.  I didn't try that.)  This
makes the unlit corner show up if light hits the spot next to it, so
that it behaves like the other lit walls surrounding that entry area.

I haven't marked the bug report closed because I don't think this is
the proper way to fix this.

doc/fixes36.2

@@ -1,4 +1,4 @@
-$NHDT-Branch: NetHack-3.6.2-beta01 $:$NHDT-Revision: 1.226 $ $NHDT-Date: 1547118629 2019/01/10 11:10:29 $
+$NHDT-Branch: NetHack-3.6.2-beta01 $:$NHDT-Revision: 1.227 $ $NHDT-Date: 1547262477 2019/01/12 03:07:57 $
 
 This fixes36.2 file is here to capture information about updates in the 3.6.x
 lineage following the release of 3.6.1 in April 2018. Please note, however,
@@ -329,6 +329,11 @@ when ^T resorted to the teleport-away spell if hero didn't have intrinsic
 	with 'Z') possible after forgetting the spellbook due to amnesia
 setting SEDUCE=0 made all succubus and incubus attacks be described as
 	smiling engagingly or seductively rather than hitting or missing
+entering Ft.Ludios with a lit candle lit up the entire entry room except for
+	one corner spot; that corner is beyond candle radius but other spots
+	even further away were being shown; add a hack to knox.des to make
+	that corner show up too, although a proper fix should make the other
+	walls not be seen until approached
 
 
 Fixes to Post-3.6.1 Problems that Were Exposed Via git Repository