Resolve compile error in Unity 2018.1

Author: lawwong

Assets/HTC.UnityPlugin/PoseTracker/Pose.cs

@@ -173,7 +173,8 @@ public static void SetRigidbodyAngularVelocity(Rigidbody rigidbody, Quaternion f
         {
             float angle;
             Vector3 axis;
-            (to * Quaternion.Inverse(from)).ToAngleAxis(out angle, out axis);
+            var fromToRot = to * Quaternion.Inverse(from);
+            fromToRot.ToAngleAxis(out angle, out axis);
             while (angle > 180f) { angle -= 360f; }
 
             if (Mathf.Approximately(angle, 0f) || float.IsNaN(axis.x) || float.IsNaN(axis.y) || float.IsNaN(axis.z))

Assets/HTC.UnityPlugin/Utility/RigidPose.cs

@@ -175,7 +175,8 @@ public static void SetRigidbodyAngularVelocity(Rigidbody rigidbody, Quaternion f
         {
             float angle;
             Vector3 axis;
-            (to * Quaternion.Inverse(from)).ToAngleAxis(out angle, out axis);
+            var fromToRot = to * Quaternion.Inverse(from);
+            fromToRot.ToAngleAxis(out angle, out axis);
             while (angle > 180f) { angle -= 360f; }
 
             if (Mathf.Approximately(angle, 0f) || float.IsNaN(axis.x) || float.IsNaN(axis.y) || float.IsNaN(axis.z))

Assets/HTC.UnityPlugin/ViveInputUtility/Scripts/VIUVersion.cs

@@ -6,6 +6,6 @@ namespace HTC.UnityPlugin.Vive
 {
     public static class VIUVersion
     {
-        public static readonly Version current = new Version("1.8.0.0");
+        public static readonly Version current = new Version("1.8.0.1");
     }
 }