breaking wands (trunk only)

From a bug report, polymorph of self due to
breaking a wand also polymorphed various items that were dropped in the
process, unlike the case of zapping polymorph at monsters which excludes
dropped items from being poly'd.  This polymorphs the pile at the hero's
feet before polymorphing the hero.  I first tried to handle it using
obj->bypass like with monsters, but that didn't work.  Post-3.4.3, the
bypass handling is also used for polyself (by retouch_equipment()) and
it was getting reset at an inconvenient time.

     He also complained that he failed to get "you feel shuddering
vibrations" when some polymorphed objects got destroyed.  That message
is issued by weffects() which do_break_wand() doesn't call.  It ought to
be fixed, but this patch doesn't address it.

     Lastly, add code to prevent objects guarded against polymorph via
obj->bypass from getting used up when creating polypile golems.

doc/fixes35.0

@@ -287,6 +287,9 @@ when probing from inside an engulfer, "not carrying anything" overlooked hero
 wearing or removing an amulet of restful sleep clobbered permanent sleepiness
 if attempt to select a co-aligned artifact for first divine gift fails because
 	none is available, choose one from among nonaligned artifacts
+if breaking a wand of polymorph causes hero to drop items, don't transform them
+if polymorph causes a monster to drop items, they won't be used up via
+	shuddering vibrations or as golem creation fodder
 
 
 Platform- and/or Interface-Specific Fixes