10887 Missing void cast in wcuwsrv()

@@ -20,10 +20,11 @@
  */
 
 /*
  * Copyright (c) 1987, 2010, Oracle and/or its affiliates. All rights reserved.
  * Copyright 2019 Toomas Soome <tsoome@me.com>
+ * Copyright 2019 Joyent, Inc.
  */
 
 /*
  * "Workstation console" multiplexor driver for Sun.
  *

@@ -509,11 +510,11 @@
                  * expire, current transmission to finish, output to be
                  * restarted, output to finish draining), don't grab anything
                  * new.
                  */
                 if (pvc->vc_flags & (WCS_DELAY|WCS_BUSY|WCS_STOPPED)) {
-                        putbq(q, mp);
+                        (void) putbq(q, mp);
                         return (0);
                 }
 
                 switch (mp->b_datap->db_type) {
                 default:        /* drop unknown type */