vomiting while fainting

From a beta-tester running 3.6.0:
|You faint from lack of food.
|You suddenly vomit!

The latter has already been changed to "You vomit" (it's given at the
end of a multiple-message vomiting countdown so wasn't "sudden") but is
still odd if your stomach is so empty that you're subject to fainting.
Give an alternate message in that case:
|Your stomach heaves convulsively!

Vomiting while unconscious (when that's due to something other than
fainting from hunger) should pose a risk of choking to death, but I'm
going to pretend that this hasn't occurred to me....

src/timeout.c

@@ -204,8 +204,10 @@ vomiting_dialogue()
                that message and "You can move again." (from vomit()'s
                nomul(-2)) with no intervening message; give one here to
                have more specific point at which hero became unable to move
-               [vomit() issues its own message for the cantvomit() case] */
-            You("%s!", !Hallucination ? "vomit" : "hurl chunks");
+               [vomit() issues its own message for the cantvomit() case
+               and for the FAINTING-or-worse case where stomach is empty] */
+            if (u.uhs < FAINTING)
+                You("%s!", !Hallucination ? "vomit" : "hurl chunks");
         }
         vomit();
         break;