fixes entry for pull-req #643 - historic statues

monstone() was using a hardcoded value when flagging the statue of
a unique monster as historic and didn't get updated when the corpse
and statue flags kept in obj->spe were changed last June by commit
04a8ddcce1.

Closes #643

doc/fixes37.0

@@ -927,6 +927,9 @@ in wizard mode, a poly'd priest/priestess attempting to polymorph into priest
 	because "priest" matched "aligned cleric" rather than the role monster
 if a glob which has just shrunk away to nothing was wielded or quivered,
 	unwield it before destroying it
+after changes to gender tracking for corpses and statues, when a unique
+	monster got turned into a statue if was erroneouly flagged as female
+	rather than 'historic'
 
 curses: 'msg_window' option wasn't functional for curses unless the binary
 	also included tty support

src/mon.c

@@ -2696,6 +2696,7 @@ monstone(struct monst* mdef)
     if ((int) mdef->data->msize > MZ_TINY
         || !rn2(2 + ((int) (mdef->data->geno & G_FREQ) > 2))) {
         unsigned corpstatflags = CORPSTAT_NONE;
+
         oldminvent = 0;
         /* some objects may end up outside the statue */
         while ((obj = mdef->minvent) != 0) {