Error in new_CppObject_xp

[bgoodri]

I got the fixes mixed up. Actually, you need

new_CppObject_xp .. constructor in 2.16; and how to configure TravisCI

In tools/make_cpp.R, you need to change line 36 from constructors = list(c("SEXP", "SEXP")), fields = character(), to constructors = list(c("SEXP", "SEXP", "SEXP")), fields = character(),