Test for funcfiletrace used in configure is broken on zsh 5.3

[Iain R. Learmonth]

https://bugs.debian.org/851501

Instead of parsing the output of declare -p, instead use if (( ${+funcfiletrace} )) as this is no longer listed in that output.

An explicit zmodload zsh/parameter also could not hurt.

[R. Bernstein]

I guess you are referring to https://github.com/rocky/zshdb/blob/master/test/zsh/ok4zshdb.sh#L7 ?

Since you are there in the weeds already would you please make a patch and suggest that. I just looked and I'm currrently using zsh 5.1.1 (x86_64-ubuntu-linux-gnu).

Likewise with the suggestion to use zmodload zsh/parameter.

Thanks.