attach: use brackets around flag check

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

diff --git a/src/lxc/attach.c b/src/lxc/attach.c
index 0c26419548a8427a95607044c7a3eaaa6e584bd9..433fe4f7fa1cb8cb5dc28827c5921d89b9c89cc8 100644 (file)
--- a/src/lxc/attach.c
+++ b/src/lxc/attach.c
@@ -1204,7 +1204,8 @@ __noreturn static void do_attach(struct attach_payload *ap)
                        goto on_error;
        }
 
-       if (options->attach_flags & LXC_ATTACH_SETGROUPS && options->groups.size > 0) {
+       if ((options->attach_flags & LXC_ATTACH_SETGROUPS) &&
+           options->groups.size > 0) {
                if (!lxc_setgroups(options->groups.list, options->groups.size))
                        goto on_error;
        } else {