ensure that the 'safe' objects remain safe

since Elbereth doesn't work if you're not on the square anymore, we need
to make sure that critters are discouraged from grabbing the sokoban
prize or the castle wand.

also, fix up the level compiler makefiles so that uncommenting the
YACC/LEX definitions (presuming you have the right tools installed)
works properly.

win/win32/levstuff.mak

@@ -1,26 +1,18 @@
 # $NHDT-Date$  $NHDT-Branch$:$NHDT-Revision$
 # $Date:2002/01/22 22:54:54 $  $Revision: 1.2 $
-#YACC   = byacc.exe
-#LEX	= flex.exe
-#YTABC   = y_tab.c
-#YTABH   = y_tab.h
-#LEXYYC  = lexyy.c
 
-!IF "$(YACC)"!=""
-@echo Yacc-alike set to $(YACC)
-@echo YTABC set to $(YTABC)
-@echo YTABH set to $(YTABH)
-!ENDIF
+# Set all of these or none of them.
+#
+# bison and flex are the ones found in GnuWin32, which
+# is probably the easiest set of these tools to find
+# on Windows.
+#
+#YACC    = bison.exe -y
+#LEX     = flex.exe
+#YTABC   = y.tab.c
+#YTABH   = y.tab.h
+#LEXYYC  = lex.yy.c
 
-!IF "$(LEX)"!=""
-@echo Lex-alike set to $(LEX)
-@echo LEXYYC set to $(LEXYYC)
-!ENDIF
-
-# these won't have an impact unless YACC/LEX are defined
-YTABC = y.tab.c
-YTABH = y.tab.h
-LEXYYC = lex.yy.c
 
 default: all