Redundant strlen(query) in get_rel_infos

Hi.

While reviewing another patch to the file info.c, I noticed there seem
to be some unnecessary calls to strlen(query) in get_rel_infos()
function.

i.e. The query is explicitly initialized to an empty string
immediately prior, so why the strlen?

PSA patch for this.

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Kind Regards,
Peter Smith.
Fujitsu Australia