8485 Remove set but unused variables in usr/src/cmd

@@ -18,10 +18,11 @@
  *
  * CDDL HEADER END
  */
 
 /*
+ * Copyright 2017 Gary Mills
  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
 /*

@@ -582,11 +583,11 @@
 
 static void
 show_options(const uint8_t *data, int len)
 {
         dhcpv6_option_t d6o;
-        uint_t olen, retlen;
+        uint_t olen;
         uint16_t val16;
         uint16_t type;
         uint32_t val32;
         const uint8_t *ostart;
         char *str, *sp;

@@ -764,11 +765,11 @@
                         break;
                 case DHCPV6_OPT_RELAY_MSG:
                         if (olen > 0) {
                                 oldnest = prot_nest_prefix;
                                 prot_nest_prefix = prot_prefix;
-                                retlen = interpret_dhcpv6(F_DTAIL, data, olen);
+                                (void) interpret_dhcpv6(F_DTAIL, data, olen);
                                 prot_prefix = prot_nest_prefix;
                                 prot_nest_prefix = oldnest;
                         }
                         break;
                 case DHCPV6_OPT_AUTH: {