Fix: a number of unblock_points shouldn't unblock unconditionally

Initially diagnosed in an xnethack fuzzer crash - unblock_point
shouldn't be called when a closed door becomes non-closed, because it's
possible that there's a gas cloud on the space which means it still
blocks vision. These always need to be recalc_block_point. A number of
them were fixed, but when I went through all the xnethack ones, I found
some that were unchanged from upstream NetHack. I reproduced the sanity
check impossibles usually by breathing gas at a door as an iron golem
and then opening or destroying the door to trigger the unblock_point
call.

The use of recalc_block_point in wizterrainwish was not triggering this
bug, but the previous code there basically duplicated
recalc_block_point.

src/dokick.c

@@ -949,7 +949,7 @@ kick_door(coordxy x, coordxy y, int avrg_attrib)
             gm.maploc->doormask = D_BROKEN;
         }
         feel_newsym(x, y); /* we know we broke it */
-        unblock_point(x, y); /* vision */
+        recalc_block_point(x, y); /* vision */
         if (shopdoor) {
             add_damage(x, y, SHOP_DOOR_COST);
             pay_for_damage("break", FALSE);