fix some out-of-bounds error in the OpenCL rigid body pipeline

re-enable an OpenCL/gpu rigid body example (box-box stack)

examples/OpenCL/rigidbody/GpuRigidBodyDemoInternalData.h

@@ -0,0 +1,55 @@
+#ifndef GPU_RIGIDBODY_INTERNAL_DATA_H
+#define GPU_RIGIDBODY_INTERNAL_DATA_H
+
+#include "Bullet3OpenCL/Initialize/b3OpenCLUtils.h"
+#include "Bullet3OpenCL/ParallelPrimitives/b3OpenCLArray.h"
+#include "Bullet3Common/b3Vector3.h"
+#include "Bullet3Collision/NarrowPhaseCollision/b3Config.h"
+
+struct	GpuRigidBodyDemoInternalData
+{
+	
+	cl_kernel	m_copyTransformsToVBOKernel;
+
+	b3OpenCLArray<b3Vector4>*	m_instancePosOrnColor;
+
+	class b3GpuRigidBodyPipeline* m_rigidBodyPipeline;
+
+	class b3GpuNarrowPhase* m_np;
+	class b3GpuBroadphaseInterface* m_bp;
+	class b3DynamicBvhBroadphase* m_broadphaseDbvt;
+
+	b3Vector3 m_pickPivotInA;
+	b3Vector3 m_pickPivotInB;
+	float m_pickDistance;
+	int m_pickBody;
+	int	m_pickConstraint;
+
+	int m_altPressed;
+	int m_controlPressed;
+	
+	int m_pickFixedBody;
+	int m_pickGraphicsShapeIndex;
+	int m_pickGraphicsShapeInstance;
+	b3Config m_config;
+
+	GpuRigidBodyDemoInternalData()
+		:m_instancePosOrnColor(0),
+		m_copyTransformsToVBOKernel(0),	m_rigidBodyPipeline(0),
+		m_np(0),
+		m_bp(0),
+		m_broadphaseDbvt(0),
+		m_pickConstraint(-1),
+		m_pickFixedBody(-1),
+		m_pickGraphicsShapeIndex(-1),
+		m_pickGraphicsShapeInstance(-1),
+		m_pickBody(-1),
+		m_altPressed(0),
+		m_controlPressed(0)
+
+	{
+	}
+};
+
+#endif//GPU_RIGIDBODY_INTERNAL_DATA_H
+