JuliaLang/julia — pull request #5318 by lindahua (2014-01-07 03:45:33+00:00)
Title: minor update of sum_seq

When input array is not empty, zero(T) is not required to be defined.

This fixes the problem mentioned in https://groups.google.com/forum/#!topic/julia-users/5vNtBvRR9Vo.