It is not an error to set an array with allocated size 0 to have length 0.

                               &inp->{c_name}.n_, inp->{c_name}.elts_, newlen,

                               sizeof(inp->{c_name}.elts_[0]), {freefn},

                               &inp->trunnel_error_code_);

                if (newptr == NULL)

                if (newlen != 0 && newptr == NULL)

                  goto trunnel_alloc_failed;

                inp->{c_name}.elts_ = newptr;

                return 0;""", c_name=sva.c_name, freefn=freefn)