Is there any error in instructing the jury on voluntary manslaughter?

The jury found under properly given instructions that the murder was intentional, and was committed in the perpetration of robbery, thus establishing that the killing was murder of the first degree under the felony-murder rule and section 189 without the necessity of proving malice. Any error in failing to instruct on voluntary manslaughter was harmless. (People v. Sedeno (1974) 10 Cal.3d 703, 721, 112 Cal.Rptr. 1, 518 P.2d 913. See also People v. Saille (1991) 54 Cal.3d 1103, 1114, 2 Cal.Rptr.2d 364, 820 P.2d 588 [Malice shown whenever killing is intentional unless negated by evidence of sudden quarrel or heat of passion].)