Fixed how login/zoning session start is handled. Should fix the bug where a player could not relogin into a server twice.

FFXIVClassic Map Server/packets/WorldPackets/Receive/SessionBeginPacket.cs

@@ -9,11 +9,25 @@ namespace FFXIVClassic_Map_Server.packets.WorldPackets.Receive
 {
     class SessionBeginPacket
     {
+        public bool isLogin;
         public bool invalidPacket = false;
 
         public SessionBeginPacket(byte[] data)
         {
-           
+            using (MemoryStream mem = new MemoryStream(data))
+            {
+                using (BinaryReader binReader = new BinaryReader(mem))
+                {
+                    try
+                    {
+                        isLogin = binReader.ReadByte() != 0;                      
+                    }
+                    catch (Exception)
+                    {
+                        invalidPacket = true;
+                    }
+                }
+            }
         }
     }
 }