Method zero

Source/astcenc_vecmathlib_rvv_n.h:103–106

* @brief Factory that returns a vector of zeros. */

	 * @brief Factory that returns a vector of zeros.
	 */
	static ASTCENC_SIMD_INLINE vfloat zero()
	{
		return vfloat(0.0f);
	}

	/**
	 * @brief Factory that returns a replicated scalar loaded from memory.