Bugfix: bird starts caged in endgame.

Turns out the code of put() had been modified ibcorrectly, but
the bug was masked in all but a few cases, noe of which would be
encountered in normal gameplay.

A test to ensure this bug does noit recur has been added.

misc.c

@@ -602,7 +602,7 @@ loc_t put(obj_t object, loc_t where, int pval)
  *  negated game.prop values for the repository objects. */
 {
     move(object, where);
-    return STASHED(pval);
+    return (-1) - pval;;
 }
 
 void carry(obj_t object, loc_t where)

notes.adoc

@@ -69,10 +69,6 @@ Bug fixes:
 * Under odd circumstances (dropping rug or vase outdoors) the game could
   formerly say "floor" when it should say "ground" (or "dirt", or something).
 
-Bugs (accidental changes that don't seem worth the effort to fix):
-
-* Bird starts uncaged in the endgame.
-
 Enhancements:
 
 By default, advent issues "> " as a command prompt.  This feature

tests/birdsnakewake.chk

@@ -2930,7 +2930,7 @@ OK
 
 > take bird
 
-OK
+You are already carrying it!
 
 > free bird
 

tests/endobjects.chk

@@ -2435,11 +2435,12 @@ OK
 
 You are currently holding the following:
 Wicker cage
+Little bird in cage
 Small bottle
 
 > get bird
 
-OK
+You are already carrying it!
 
 > inven
 

tests/saveresume.4.chk

@@ -10,19 +10,15 @@ down a gully.
 > resume
 Can't open file y, try again.
 
-You're at sw end.
+You're in front of building.
-
-The grate is locked.
 
 > blast
 
-There is a loud explosion, and a twenty-foot hole appears in the far
+Blasting requires dynamite.
-wall, burying the dwarves in the rubble.  You march through the hole
-and find yourself in the main office, where a cheering band of
-friendly elves carry the conquering adventurer off into the sunset.
 
-You scored 423 out of a possible 430, using 468 turns.
 
-Your score puts you in Master Adventurer Class A.
+You scored 32 out of a possible 430, using 2 turns.
 
-To achieve the next higher rating, you need 4 more points.
+You are obviously a rank amateur.  Better luck next time.
+
+To achieve the next higher rating, you need 14 more points.

tests/takebird.log

@@ -0,0 +1,351 @@
+## Verify that bird starts caged in endgame
+no
+seed 1318612053
+e
+plugh
+plove
+get emerald
+w
+drop emerald
+e
+ne
+get pyramid
+s
+plove
+plugh
+drop pyramid
+get lamp
+get water
+plugh
+on
+s
+d
+bedquilt
+w
+e
+take pillow
+w
+oriental
+take vase
+n
+w
+take emerald
+nw
+s
+se
+w
+w
+d
+water plant
+u
+e
+d
+fill bottle
+u
+e
+ne
+e
+u
+e
+u
+n
+plugh
+drop pillow
+drop vase
+drop bottle
+drop emerald
+xyzzy
+take rod
+e
+take cage
+pit
+drop rod
+e
+take bird
+w
+drop bird
+take rod
+wave rod
+take necklace
+drop rod
+take bird
+d
+s
+take nugget
+n
+n
+drop bird
+take bird
+sw
+w
+kill dragon
+yes
+drink blood
+take rug
+e
+e
+n
+take bars
+n
+plugh
+drop cage
+drop necklace
+drop nugget
+drop bars
+drop rug
+xyzzy
+pit
+take rod
+d
+w
+wave rod
+w
+take diamonds
+w
+w
+w
+s
+s
+e
+s
+hit machine
+s
+s
+kill ogre
+n
+take ruby
+s
+w
+n
+n
+sw
+w
+d
+n
+e
+take coins
+e
+s
+take jewelry
+n
+e
+w
+w
+w
+s
+e
+s
+s
+s
+n
+e
+e
+nw
+drop rod
+take jewelry
+take chest
+take ruby
+take diamonds
+take coins
+se
+w
+s
+d
+debris
+xyzzy
+off
+drop coins
+drop diamonds
+drop jewelry
+drop chest
+drop lamp
+take rug
+take emerald
+take cage
+take bottle
+w
+s
+w
+drop bird
+listen
+drop cage
+n
+take appendage
+n
+e
+n
+n
+fill urn
+light urn
+rub urn
+drop rug
+take amber
+drop emerald
+fly
+take sapphire
+fly
+take emerald
+drop ruby
+take rug
+take ruby
+e
+s
+e
+e
+e
+drop emerald
+drop ruby
+drop amber
+drop rug
+drop sapphire
+fill bottle
+take lamp
+plugh
+on
+s
+s
+sw
+w
+n
+reservoir
+n'beh
+n
+n
+u
+u
+u
+u
+u
+ne
+take statuette
+sw
+d
+d
+d
+d
+d
+s
+s
+s
+s
+d
+s
+d
+water plant
+u
+e
+d
+fill bottle
+u
+w
+d
+climb
+w
+take eggs
+n
+oil door
+drop bottle
+n
+take trident
+w
+d
+bedquilt
+e
+n
+open clam
+d
+d
+take pearl
+shell
+s
+u
+e
+u
+n
+plugh
+drop trident
+drop pearl
+drop statuette
+drop appendage
+take keys
+take food
+plugh
+s
+d
+bedquilt
+w
+oriental
+w
+sw
+u
+throw eggs
+ne
+barren
+e
+throw food
+unlock chain
+take chain
+take bear
+fork
+ne
+fee
+fie
+foe
+foo
+e
+take spices
+fork
+w
+w
+sw
+release bear
+sw
+sw
+d
+se
+se
+w
+w
+d
+climb
+w
+take eggs
+n
+n
+w
+d
+bedquilt
+e
+u
+e
+u
+n
+plugh
+drop eggs
+drop chain
+drop spices
+plugh
+s
+look
+look
+n
+plugh
+s
+d
+w
+d
+e
+take magazine
+e
+drop magazine
+look
+look
+look
+look
+look
+look
+look
+sw
+# Good response "OK".
+# Buggy response: "You can catch the bird, but you cannot carry it."
+take bird