Achievements: Keep track of the earliest unlocked win condition (#3504)

For sets that have more than one win condition, e.g. RE2.

dep/rcheevos/src/rc_client.c

@@ -954,9 +954,9 @@ static void rc_client_subset_get_user_game_summary(const rc_client_subset_info_t
           }
           else if (achievement->public_.type == RC_CLIENT_ACHIEVEMENT_TYPE_WIN)
           {
-            first_win_condition_unlock = (first_win_condition_unlock == 0) ?
-                                           achievement->public_.unlock_time :
-                                           first_win_condition_unlock;
+            if (first_win_condition_unlock == 0 ||
+                (achievement->public_.unlock_time > 0 && achievement->public_.unlock_time < first_win_condition_unlock))
+              first_win_condition_unlock = achievement->public_.unlock_time;
           }
         }