www/mohawk: Fix build with Clang 10

main.c:387:2: error: misleading indentation; statement is not part of the previous 'if' [-Werror,-Wmisleading-indentation]

if (network->not)
^

http://beefy18.nyi.freebsd.org/data/head-amd64-default/p529299_s359382/logs/errors/mohawk-2.0.20.log