Fixed pre-5.2 preprocessor directives

spine-unity/Assets/spine-unity/Modules/Mesh Generation Samples/VertexHelperSpineMeshGenerator.cs

@@ -29,7 +29,7 @@
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *****************************************************************************/
 
-#if (UNITY_5_0 || UNITY_5_1 || UNITY_4)
+#if (UNITY_5_0 || UNITY_5_1 || UNITY_4_0 || UNITY_4_1 || UNITY_4_2 || UNITY_4_3 || UNITY_4_4 || UNITY_4_5 || UNITY_4_6 || UNITY_4_7)
 #define PREUNITY_5_2
 #endif
 

spine-unity/Assets/spine-unity/Modules/SkeletonGraphic/Editor/SkeletonGraphicInspector.cs

@@ -1,4 +1,4 @@
-#if (UNITY_5_0 || UNITY_5_1 || UNITY_4)
+#if (UNITY_5_0 || UNITY_5_1 || UNITY_4_0 || UNITY_4_1 || UNITY_4_2 || UNITY_4_3 || UNITY_4_4 || UNITY_4_5 || UNITY_4_6 || UNITY_4_7)
 #define PREUNITY_5_2
 #endif
 

spine-unity/Assets/spine-unity/Modules/SkeletonGraphic/SkeletonGraphic.cs

@@ -29,7 +29,7 @@
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *****************************************************************************/
 
-#if (UNITY_5_0 || UNITY_5_1 || UNITY_4)
+#if (UNITY_5_0 || UNITY_5_1 || UNITY_4_0 || UNITY_4_1 || UNITY_4_2 || UNITY_4_3 || UNITY_4_4 || UNITY_4_5 || UNITY_4_6 || UNITY_4_7)
 #define PREUNITY_5_2
 #endif