fix MSG_SELECT_SUM

Game/GameAI.cs

@@ -573,6 +573,12 @@ namespace WindBot.Game
             if (mode)
             {
                 // equal
+
+                if (sum == 0 && min == 0)
+                {
+                    return new List<ClientCard>();
+                }
+
                 if (min <= 1)
                 {
                     // try special level first

Game/GameBehavior.cs

@@ -1316,9 +1316,11 @@ namespace WindBot.Game
             {
                 result[index++] = 0;
             }
-            for (int i = 0; i < selected.Count; ++i)
+            int l = 0;
+            while (l < selected.Count)
             {
-                result[index++] = (byte)selected[i].SelectSeq;
+                result[index++] = (byte)selected[l].SelectSeq;
+                ++l;
             }
 
             BinaryWriter reply = GamePacketFactory.Create(CtosMessage.Response);