undo btQuadWord changes, added integration in parallel SpuSampleTask

src/LinearMath/btVector3.h

@@ -48,13 +48,7 @@ public:
 	SIMD_FORCE_INLINE btVector3& operator+=(const btVector3& v)
 	{
 
-#ifdef __PPU__
-		m_Vec128 = vec_add( m_Vec128, v.get128() );
-#elif defined __SPU__
-		m_Vec128 = spu_add( m_Vec128, v.get128() ); 
-#else
 		m_x += v.x(); m_y += v.y(); m_z += v.z();
-#endif
 		return *this;
 	}