256 S.E.2d 806 (1979)
297 N.C. 454
HARRINGTON MANUFACTURING COMPANY, INC.
HARRINGTON MANUFACTURING COMPANY, INC.
v.
LOGAN TONTZ COMPANY and Triad Metal Products Company.
Supreme Court of North Carolina.
June 5, 1979.Pritchett, Cooke & Burch, for plaintiff.
Turner, Enochs, Foster & Burnley, for defendants.
Petition by plaintiff for discretionary review under G.S. § 7A-31. 40 N.C.App. 496, 253 S.E.2d 282. Denied.