adjusted proph_extract_winner to only consider the thread identifier

theories/logatom/rdcss/rdcss.v

@@ -163,7 +163,7 @@ Section rdcss.
 
   Fixpoint proph_extract_winner (pvs : list (val * val)) : option proph_id :=
     match pvs with
-    | ((_, #true)%V, LitV (LitProphecy tid)) :: _  => Some tid
+    | ((_, _)%V, LitV (LitProphecy tid)) :: _  => Some tid
     | _                               => None
     end.