Fixes #304

* spot/misc/game.cc: here.

spot/misc/game.cc

@@ -103,7 +103,8 @@ parity_game::attractor(const region_t& subgame, region_t& set,
                 }
               ++i;
             }
-          if ((owner_[s] == odd && any) || (owner_[s] != odd && all))
+          if ((((owner_[s] && odd) || (!owner_[s] && !odd)) && any) ||
+              (((!owner_[s] && odd) || (owner_[s] && !odd)) && all))
             {
               set.insert(s);
               delta.insert(s);

[Alexandre Duret-Lutz]

Wouldn't it work to just force the conversion from owner_[s] to bool with !!owner_[s]? We could also improve the original code by explicitly making the lookup+comparison once.

bool owner_is_odd = !!owner_[s] == odd;
if ((owner_is_odd && any) || (!owner_is_odd && all))
   ...