bugfix - z was discarded?

Author: rms80

interpreters/GCodeInterpreter.cs

@@ -45,7 +45,7 @@ public LinearMoveData(Vector2d pos,
 source = null;
 }
 public LinearMoveData(Vector3d pos, double rateIn = GCodeUtil.UnspecifiedValue) {
-position = new Vector3d(pos.x, pos.y, GCodeUtil.UnspecifiedValue);
+ position = pos;
 rate = rateIn;
 extrude = GCodeUtil.UnspecifiedPosition;
 source = null;