input: Attend format-overflow warnings.
input: Attend format-overflow warnings.

Logging verbosity should not pass NULL to syslog, assume the default in
"Info".

OXT-1709

Signed-off-by: Eric Chanudet <945795ca4030d561e78db98ba644d7fd3cee2cf0@ainfosec.com>

OpenXT/input,OpenXT/input,OpenXT/input