10124 smatch fixes for cryptoadm

*** 21,30 ****
--- 21,31 ----
  /*
   * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
   */
  /*
   * Copyright 2010 Nexenta Systems, Inc.  All rights resrved.
+  * Copyright (c) 2018, Joyent, Inc.
   */
  
  #include <cryptoutil.h>
  #include <fcntl.h>
  #include <libintl.h>
*** 159,169 ****
                  p = p->next;
                  n++;
          }
  
          *pmech_list = malloc(n * sizeof (CK_MECHANISM_TYPE));
!         if (pmech_list == NULL) {
                  cryptodebug("out of memory");
                  return (FAILURE);
          }
          p = mlist;
          for (i = 0; i < n; i++) {
--- 160,170 ----
                  p = p->next;
                  n++;
          }
  
          *pmech_list = malloc(n * sizeof (CK_MECHANISM_TYPE));
!         if (*pmech_list == NULL) {
                  cryptodebug("out of memory");
                  return (FAILURE);
          }
          p = mlist;
          for (i = 0; i < n; i++) {