fix #H4919 - vomit message sequencing

The countdown for delayed vomiting gave message "you suddenly vomit!"
at T-2, allowing you to move some more, then vomit at T-0 with no
message, finally at T+2 get "you can move again", making it seem as
if the program was letting you move during a time it thought that you
couldn't move.  Also, there was nothing "sudden" about it since it was
near the end of a 15 or so turn sequence where a few other messages
are given leading up to that.

Change it to
T-2: You are about to vomit.  // different wording
T-0: You vomit!               // new message
so that "you can move again" more clearly refers to the actual event.

doc/fixes36.1

@@ -440,6 +440,9 @@ if leash or unleash attempt was directed at "remembered, unseen monster" glyph
 wizmode level teleport menu indicates on what level you currently are
 fix invisible gold symbol in status line when S_coin was set to space
 fix buffer overflow in wizard mode for '#' command when 'extmenu' option is on
+"you suddenly vomit" was given two turns before actually vomiting, so you
+	could get that message, move a bit, then get "you can move again"
+	after the 2 turn freeze applied along with the actual vomit
 
 
 Fixes to Post-3.6.0 Problems that Were Exposed Via git Repository

src/eat.c

@@ -3129,9 +3129,15 @@ vomit() /* A good idea from David Neves */
         Your("jaw gapes convulsively.");
     else
         make_sick(0L, (char *) 0, TRUE, SICK_VOMITABLE);
-    nomul(-2);
-    multi_reason = "vomiting";
-    nomovemsg = You_can_move_again;
+
+    /* nomul()/You_can_move_again used to be unconditional, which was
+       viable while eating but not for Vomiting countdown where hero might
+       be immobilized for some other reason at the time vomit() is called */
+    if (multi >= -2) {
+        nomul(-2);
+        multi_reason = "vomiting";
+        nomovemsg = You_can_move_again;
+    }
 }
 
 int

src/timeout.c

@@ -145,13 +145,13 @@ stoned_dialogue()
     exercise(A_DEX, FALSE);
 }
 
-/* He is getting sicker and sicker prior to vomiting */
+/* hero is getting sicker and sicker prior to vomiting */
 static NEARDATA const char *const vomiting_texts[] = {
     "are feeling mildly nauseated.", /* 14 */
     "feel slightly confused.",       /* 11 */
     "can't seem to think straight.", /* 8 */
     "feel incredibly sick.",         /* 5 */
-    "suddenly vomit!"                /* 2 */
+    "are about to vomit."            /* 2 */
 };
 
 STATIC_OVL void
@@ -189,11 +189,20 @@ vomiting_dialogue()
         txt = vomiting_texts[4];
         if (cantvomit(youmonst.data))
             txt = "gag uncontrolably.";
+        else if (Hallucination)
+            /* "hurl" is short for "hurl chunks" which is slang for
+               relatively violent vomiting... */
+            txt = "are about to hurl!";
         break;
     case 0:
         stop_occupation();
         if (!cantvomit(youmonst.data))
             morehungry(20);
+        /* case 2 used to be "You suddenly vomit!" but it wasn't sudden
+           since you've just been through the earlier messages of the
+           countdown, and it was still possible to move around between
+           that message and vomit() -> numul(-2) -> "You can move again." */
+        You("vomit!");
         vomit();
         break;
     default: