BUG/MINOR: log: fix a typo that would cause %HP to log <BADREQ>

Typo was introduced in 57bc891 ("BUG/MEDIUM: log: fix risk of
segfault when logging HTTP fields in TCP mode") which inverted the
condition in the test and caused <BADREQ> to be logged when using
%HP.

Signed-off-by: Nenad Merdanovic <nmerdan@anine.io>
1 file changed