Fix debug-logging of chalresp_path. Oddity reported by clang.
Fix debug-logging of chalresp_path. Oddity reported by clang.

Yubico/yubico-pam,madrat-/yubico-pam,Yubico/yubico-pam,Yubico/yubico-pam,madrat-/yubico-pam,eworm-de/yubico-pam,eworm-de/yubico-pam,madrat-/yubico-pam,eworm-de/yubico-pam