Fix regression to verbose behavior introduced in 68bff4a.

Reported by:    Brad Davis (brd)
Reviewed by:    Kristof Provost (kp)
MFC after:      1 week
Differential Revision:  https://reviews.freebsd.org/D32736
Sponsored by:   Netflix

sbin/geom/core/geom.c

@@ -445,7 +445,7 @@ set_flags(struct g_command *cmd)
 {
 	unsigned flags = 0;
 
-	if ((cmd->gc_flags & G_FLAG_VERBOSE) != 0)
+	if ((cmd->gc_flags & G_FLAG_VERBOSE) != 0 && verbose)
 		flags |= G_FLAG_VERBOSE;
 
 	return (flags);