Magic-number elimination and fix

More test coverage for some of the cases

actions.c

@@ -113,12 +113,12 @@ static int attack(struct command_t *command)
         state_change(DRAGON, DRAGON_DEAD);
         game.prop[RUG] = RUG_FLOOR;
         /* Hardcoding LOC_SECRET5 as the dragon's death location is ugly.
-         * The way it was computed before was wirse; it depended on the
+         * The way it was computed before was worse; it depended on the
          * two dragon locations being LOC_SECRET4 and LOC_SECRET6 and
          * LOC_SECRET5 being right between them.
          */
-        move(DRAGON + NOBJECTS, -1);
+        move(DRAGON + NOBJECTS, IS_FIXED);
-        move(RUG + NOBJECTS, LOC_NOWHERE);
+        move(RUG + NOBJECTS, IS_FREE);
         move(DRAGON, LOC_SECRET5);
         move(RUG, LOC_SECRET5);
         drop(BLOOD, LOC_SECRET5);
@@ -493,7 +493,7 @@ static int discard(token_t verb, obj_t obj)
     } else if (obj == BEAR && AT(TROLL)) {
         state_change(TROLL, TROLL_GONE);
         move(TROLL, LOC_NOWHERE);
-        move(TROLL + NOBJECTS, LOC_NOWHERE);
+        move(TROLL + NOBJECTS, IS_FREE);
         move(TROLL2, objects[TROLL].plac);
         move(TROLL2 + NOBJECTS, objects[TROLL].fixd);
         juggle(CHASM);
@@ -1150,7 +1150,7 @@ static int throw (struct command_t *command)
         /*  Snarf a treasure for the troll. */
         drop(command->obj, LOC_NOWHERE);
         move(TROLL, LOC_NOWHERE);
-        move(TROLL + NOBJECTS, LOC_NOWHERE);
+        move(TROLL + NOBJECTS, IS_FREE);
         drop(TROLL2, objects[TROLL].plac);
         drop(TROLL2 + NOBJECTS, objects[TROLL].fixd);
         juggle(CHASM);

misc.c

@@ -607,7 +607,8 @@ void drop(obj_t object, loc_t where)
             --game.holdng;
         game.place[object] = where;
     }
-    if (where <= 0)
+    if (where == LOC_NOWHERE ||
+        where == CARRIED)
         return;
     game.link[object] = game.atloc[where];
     game.atloc[where] = object;

tests/oldstyle.chk

@@ -24,6 +24,11 @@ z
 
 Sorry, I don't know the word "Z".
 
+go south
+
+You are in a valley in the forest beside a stream tumbling along a
+rocky bed.
+
 quit
 
 Do you really want to quit now?
@@ -32,7 +37,7 @@ yes
 
 OK
 
-You scored 32 out of a possible 430, using 5 turns.
+You scored 32 out of a possible 430, using 6 turns.
 
 You are obviously a rank amateur.  Better luck next time.
 

tests/oldstyle.log

@@ -5,5 +5,6 @@ i
 l
 x
 z
+go south
 quit
 yes

tests/wakedwarves3.log

@@ -0,0 +1,472 @@
+## Wake the dwarves differently and die.
+n
+seed 1838473132
+in
+take lamp
+xyzzy
+on
+take rod
+e
+take cage
+w
+w
+w
+drop rod
+take bird
+take rod
+w
+free bird
+wave rod
+take necklace
+drop rod
+take bird
+take rod
+d
+d
+free bird
+drop rod
+drop cage
+take cage
+take bird
+w
+take coins
+e
+s
+take jewelry
+n
+up
+s
+take gold
+n
+d
+n
+n
+plugh
+extinguish lamp
+drop coins
+drop jewelry
+drop necklace
+drop gold
+plugh
+on
+s
+take silver
+s
+sw
+take axe
+w
+kill dragon
+yes
+drink blood
+take rug
+e
+e
+up
+d
+n
+n
+off
+plugh
+inven
+drop rug
+drop silver
+out
+s
+w
+n
+take appendage
+free bird
+drop cage
+listen
+s
+s
+n
+in
+take water
+plugh
+on
+plover
+ne
+take pyramid
+s
+plover
+s
+s
+take rod
+up
+w
+wave rod
+drop rod
+west
+take diamonds
+w
+w
+w
+s
+sw
+se
+s
+kill machine
+s
+s
+kill ogre
+n
+take ruby
+s
+w
+n
+n
+n
+nw
+d
+e
+e
+e
+e
+e
+throw axe
+take axe
+n
+n
+n
+off
+plugh
+drop ruby
+drop diamonds
+drop pyramid
+plugh
+on
+s
+s
+u
+n
+n
+d
+bedquilt
+throw axe
+take axe
+slab
+s
+d
+water plant
+u
+w
+u
+reservoir
+H'CFL
+n
+n
+nw
+u
+u
+u
+u
+ne
+take ebony
+sw
+d
+d
+d
+d
+d
+take water
+s
+s
+s
+s
+d
+s
+d
+water plant
+u
+drop appendage
+e
+d
+get oil
+
+u
+w
+d
+climb
+w
+n
+oil door
+drop bottle
+n
+take trident
+w
+d
+se
+n
+w
+drop trident
+drop ebony
+drop axe
+drop lantern
+e
+take emerald
+w
+take lamp
+take axe
+take ebony
+take trident
+nw
+s
+take vase
+se
+throw axe
+take axe
+e
+take pillow
+w
+drop axe
+ne
+e
+n
+open clam
+s
+u
+e
+u
+n
+off
+plugh
+drop pillow
+drop vase
+drop trident
+drop emerald
+drop ebony
+take keys
+take food
+plugh
+on
+s
+d
+w
+d
+n
+d
+d
+take pearl
+u
+u
+s
+w
+w
+w
+w
+d
+climb
+w
+get eggs
+n
+take bottle
+n
+w
+d
+sw
+u
+toss eggs
+ne
+ne
+barren
+in
+feed bear
+unlock chain
+take chain
+take bear
+fork
+ne
+e
+take spices
+drop keys
+fork
+w
+w
+sw
+free bear
+inven
+sw
+sw
+d
+se
+se
+w
+d
+get oil
+up
+e
+take axe
+w
+w
+d
+climb
+w
+fee
+fie
+foe
+foo
+take eggs
+s
+d
+u
+w
+u
+s
+e
+e
+n
+n
+off
+plugh
+drop eggs
+drop pearl
+drop spices
+drop chain
+take rug
+take ruby
+take emerald
+out
+w
+n
+n
+n
+inven
+fill urn
+light urn
+rub urn
+take amber
+drop rug
+drop emerald
+fly rug
+take sapphire
+fly rug
+take emerald
+drop ruby
+take rug
+drop bottle
+take ruby
+e
+s
+e
+e
+in
+drop ruby
+drop sapphire
+drop amber
+drop rug
+look
+plugh
+on
+s
+s
+u
+w
+w
+w
+s
+e
+s
+throw axe
+take axe
+s
+s
+n
+e
+e
+nw
+take emerald
+take chest
+se
+n
+d
+e
+e
+off
+xyzzy
+drop emerald
+drop chest
+plugh
+on
+s
+d
+w
+d
+e
+take magazine
+e
+drop magazine
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+u
+u
+e
+u
+n
+plover
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+e
+# Everything to here is from endgame428
+take rod
+drop rod
+take rod
+inven
+attack dwarf