10132 smatch fixes for MDB
Reviewed by: Andy Fiddaman <andy@omniosce.org>

*** 22,31 ****
--- 22,35 ----
   * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
  /*
+  * Copyright (c) 2018, Joyent, Inc.
+  */
+ 
+ /*
   * mdb dcmds for selected structures from
   * usr/src/uts/common/sys/crypto/spi.h
   *
   * Also the mdb module housekeeping
   */
*** 189,199 ****
      const mdb_arg_t *argv)
  {
          crypto_mech_info_t minfo;
          const char *unit = "bits";
  
!         if (! flags & DCMD_ADDRSPEC)
                  return (DCMD_USAGE);
  
          if (mdb_vread(&minfo, sizeof (crypto_mech_info_t), addr)
              == -1) {
                  mdb_warn("cannot read addr %p", addr);
--- 193,203 ----
      const mdb_arg_t *argv)
  {
          crypto_mech_info_t minfo;
          const char *unit = "bits";
  
!         if (!(flags & DCMD_ADDRSPEC))
                  return (DCMD_USAGE);
  
          if (mdb_vread(&minfo, sizeof (crypto_mech_info_t), addr)
              == -1) {
                  mdb_warn("cannot read addr %p", addr);