Fix accidental Double.MAX_VALUE coordinates in initial PlayerMoveEvent

src/main/java/net/minecraft/server/NetServerHandler.java

@@ -123,6 +123,8 @@ public class NetServerHandler extends NetHandler implements ICommandListener {
         float deltaAngle = Math.abs(this.lastYaw - this.e.yaw) +  Math.abs(this.lastPitch - this.e.pitch);
 
         if (delta > 1f/256 || deltaAngle > 10f) {
+            // Skip the first time we do this
+            if (lastPosX != Double.MAX_VALUE) {
                 PlayerMoveEvent event = new PlayerMoveEvent(Type.PLAYER_MOVE, player, from, to);
                 server.getPluginManager().callEvent(event);
     
@@ -134,6 +136,7 @@ public class NetServerHandler extends NetHandler implements ICommandListener {
                 this.e.locZ = to.getZ();
                 this.e.yaw = to.getYaw();
                 this.e.pitch = to.getPitch();
+            }
 
             this.lastPosX = this.e.locX;
             this.lastPosY = this.e.locY;