handle the case of the disconnect timeout being 0

Author: noellie-velez

com.unity.netcode.gameobjects/Runtime/Transports/UTP/UnityTransport.cs

@@ -1519,7 +1519,14 @@ public override void Send(ulong clientId, ArraySegment<byte> payload, NetworkDel
                 if (maxCapacity <= 0)
                 {
                     var fullCalculation = Math.BigMul(m_DisconnectTimeoutMS, k_MaxReliableThroughput);
-                    maxCapacity = (int)Math.Min(fullCalculation, BatchedSendQueue.MaximumMaximumCapacity);
+                    if (fullCalculation == 0)
+                    {
+                        maxCapacity = BatchedSendQueue.MaximumMaximumCapacity;
+                    }
+                    else
+                    {
+                        maxCapacity = (int)Math.Min(fullCalculation, BatchedSendQueue.MaximumMaximumCapacity);
+                    }
                 }
 
                 queue = new BatchedSendQueue(Math.Max(maxCapacity, m_MaxPayloadSize));