Neutral sacrifices disappear in a cloud of smoke

The general idea here came from SpliceHack -- give each alignment a
unique effect in what happens to its sacrifices -- but the "puff of
smoke" in Splice seemed too small.

src/pray.c

@@ -1309,7 +1309,11 @@ register struct obj *otmp;
         Your("sacrifice disappears!");
     else
         Your("sacrifice is consumed in a %s!",
-             u.ualign.type == A_LAWFUL ? "flash of light" : "burst of flame");
+             u.ualign.type == A_LAWFUL
+                ? "flash of light"
+                : u.ualign.type == A_NEUTRAL
+                    ? "cloud of smoke"
+                    : "burst of flame");
     if (carried(otmp))
         useup(otmp);
     else