ed(1): Fix [-Werror=logical-not-parentheses]
/usr/src/bin/ed/glbl.c:64:36: error: logical not is only applied to
theleft hand side of comparison [-Werror=logical-not-parentheses]

Obtained from: Dragonfly (1fff89cbaeaa43af720a1f23d9c466b756dd8a58)
MFC After: 1 month