fixing a mistaken parameter

common/src/main/scala/net/psforever/packet/game/TrainingZoneMessage.scala

@@ -27,14 +27,8 @@ import scodec.codecs._
   * 21 - `15` - NC Vehicle Training Area<br>
   * 22 - `16` - VS Vehicle Training Area
   * @param zone the virtual reality zone to send the player
-  * @param unk1 na; always zero?
-  * @param unk2 na; always zero?
-  * @param unk3 na; always zero?
   */
-final case class TrainingZoneMessage(zone : Int,
-                                     unk1 : Int,
-                                     unk2 : Int,
-                                     unk3 : Int)
+final case class TrainingZoneMessage(zone : Long)
   extends PlanetSideGamePacket {
   type Packet = TrainingZoneMessage
   def opcode = GamePacketOpcode.TrainingZoneMessage
@@ -43,9 +37,6 @@ final case class TrainingZoneMessage(zone : Int,
 
 object TrainingZoneMessage extends Marshallable[TrainingZoneMessage] {
   implicit val codec : Codec[TrainingZoneMessage] = (
-      ("zone" | uint8L) ::
-        ("unk1" | uint8L) ::
-        ("unk2" | uint8L) ::
-        ("unk3" | uint8L)
+      "zone" | uint32L
     ).as[TrainingZoneMessage]
 }

common/src/test/scala/GamePacketTest.scala

@@ -835,18 +835,15 @@ class GamePacketTest extends Specification {
 
       "decode" in {
         PacketCoding.DecodePacket(string).require match {
-          case TrainingZoneMessage(zone, unk1, unk2, unk3) =>
+          case TrainingZoneMessage(zone) =>
             zone mustEqual 19
-            unk1 mustEqual 0
-            unk2 mustEqual 0
-            unk3 mustEqual 0
           case default =>
             ko
         }
       }
 
       "encode" in {
-        val msg = TrainingZoneMessage(19, 0, 0, 0)
+        val msg = TrainingZoneMessage(19)
         val pkt = PacketCoding.EncodePacket(msg).require.toByteVector
 
         pkt mustEqual string