
    384 A.2d 996
    Graham, et vir., Appellants, v. Port Authority of Allegheny County, et al.
    Argued November 17, 1977.
    C. William Berger, with him Berger, Kapetan & Malakoff, for appellants; Cyril C. Gunst, Jr., with him P. J. McArdle, for appellee.
   Order affirmed.  