
    438 A.2d 637
    Commonwealth v. Sierra, Appellant.
    Submitted March 4, 1981.
    Thomas G. Klingensmith, Assistant Public Defender, for appellant; Michael H. Ranck, District Attorney, for Commonwealth, appellee.
    Before CERCONE, P. J., and WICKERSHAM and BRO-SKY, JJ.
   Judgment of sentence affirmed.  