[unity] Minor fix of last commit.

spine-unity/Assets/Spine Examples/Scripts/Sample Components/SkeletonRenderTexture/SkeletonRenderTextureBase.cs

@@ -27,14 +27,14 @@
  * THE SPINE RUNTIMES, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *****************************************************************************/
 
-using System;
-using UnityEngine;
-using UnityEngine.Rendering;
-
 #if UNITY_2017_2_OR_NEWER
 #define HAS_VECTOR2INT
 #endif
 
+using System;
+using UnityEngine;
+using UnityEngine.Rendering;
+
 namespace Spine.Unity.Examples {
 
 	public abstract class SkeletonRenderTextureBase : MonoBehaviour {