fix #H4436 - polyself message sequencing bug

for digesting a swallowed critter.  The "you kill <critter>" message
was left implicit, but if hero gained a level, that made "welcome
to level N+1" look like it was issued out of sequence because it's
immediate and the "you totally digest <critter>" is delayed.  Giving
the you-kill-it message explicitly makes things be more verbose but
avoids having the new-level message seem out of order.

doc/fixes36.1

@@ -320,6 +320,8 @@ monsters can throw cockatrice eggs at hero, but there was no handling for eggs
 	when the missile hit an intervening monster
 clarify that shape-shifted vampires revert to vampire form when petrified or
 	digested; when back in 'V' form, they're vulnerable to such damage
+when poly'd into an engulfer which does digestion damage, a kill resulting in
+	a level gain gave "welcome to level N+1" before "you digest <victim>"
 
 
 Fixes to Post-3.6.0 Problems that Were Exposed Via git Repository

src/uhitm.c

@@ -1949,11 +1949,13 @@ register struct attack *mattk;
                     m_useup(mdef, otmp);
 
                 newuhs(FALSE);
-                /* Message sequencing BUG: if you gain a level here,
+                /* start_engulf() issues "you engulf <mdef>" above; this
-                 * "welcome to level N+1" is given immediately and
+                   used to specify XKILL_NOMSG but we need "you kill <mdef>"
-                 * then "you totally digest <foo>" is given later.
+                   in case we're also going to get "welcome to level N+1";
-                 */
+                   "you totally digest <mdef>" will be coming soon (after
-                xkilled(mdef, XKILL_NOMSG | XKILL_NOCORPSE);
+                   several turns) but the level-gain message seems out of
+                   order if the kill message is left implicit */
+                xkilled(mdef, XKILL_GIVEMSG | XKILL_NOCORPSE);
                 if (mdef->mhp > 0) { /* monster lifesaved */
                     You("hurriedly regurgitate the sizzling in your %s.",
                         body_part(STOMACH));