fix issue with teams algo

tournaments/models/tournament.py

@@ -186,8 +186,16 @@ class Tournament(models.Model):
 
         selected_teams = complete_teams[:self.team_count]
         selected_teams.sort(key=lambda s: s.initial_weight)
-        bracket_teams = selected_teams[:seeds_count] + wildcard_bracket
+
-        group_stage_teams = selected_teams[-group_stage_members_count:] + wildcard_group_stage
+        if seeds_count > 0
+            bracket_teams = selected_teams[:seeds_count] + wildcard_bracket
+        else:
+            bracket_teams = []
+
+        if group_stage_members_count:
+            group_stage_teams = selected_teams[-group_stage_members_count:] + wildcard_group_stage
+        else:
+            group_stage_teams = []
 
         waiting_list_count = len(complete_teams) - self.team_count
         if waiting_list_count < 0: