
    Mach Lumber Company, Appellant, v. Group Builders, Inc., et al.
    Argued December 5, 1974.
    
      Gerald M. Hershenson, with him Cur-tin and Heefner, for appellant; Joseph A. Torresrossa, with him Arthur R. Littleton, and Morgan, Lewis & Bockius, for appellee.
   Order affirmed.

Van der Voort, J., absent.  