Fixed the number of components of the Line shape index buffer.

git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@10589 75d07b2b-3a1a-0410-a2c5-0572b91ccdca

engine/src/core/com/jme3/scene/shape/Line.java

@@ -73,7 +73,7 @@ public class Line extends Mesh {
         setBuffer(Type.Normal, 3, new float[]{0, 0, 1,
                                               0, 0, 1});
 
-        setBuffer(Type.Index, 3, new short[]{0, 1});
+        setBuffer(Type.Index, 2, new short[]{0, 1});
 
         updateBound();
     }