72 _tx_error needs to preserve the errno value it is supposed to display

*** 24,37 ****
  /*        All Rights Reserved   */
  
  /*
   * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
- #pragma ident   "%Z%%M% %I%     %E% SMI"        /* SVr4.0 1.2 */
- 
  #include "mt.h"
  #include <xti.h>
  #include <errno.h>
  #include <unistd.h>
  #include <stdio.h>
--- 24,36 ----
  /*        All Rights Reserved   */
  
  /*
   * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
+  * Copyright (c) 2012 Gary Mills
   */
  
  #include "mt.h"
  #include <xti.h>
  #include <errno.h>
  #include <unistd.h>
  #include <stdio.h>
*** 40,62 ****
  /* ARGSUSED1 */
  int
  _tx_error(const char *s, int api_semantics)
  {
          const char *c;
!         int n;
  
          c = t_strerror(t_errno);
          if (s != NULL && *s != '\0') {
!                 n = strlen(s);
!                 if (n) {
!                         (void) write(2, s, (unsigned)n);
                          (void) write(2, ": ", 2);
                  }
-         }
          (void) write(2, c, (unsigned)strlen(c));
          if (t_errno == TSYSERR) {
                  (void) write(2, ": ", 2);
!                 perror("");
!         } else
                  (void) write(2, "\n", 1);
          return (0);
  }
--- 39,59 ----
  /* ARGSUSED1 */
  int
  _tx_error(const char *s, int api_semantics)
  {
          const char *c;
!         int errnum = errno;     /* In case a system call fails. */
  
          c = t_strerror(t_errno);
          if (s != NULL && *s != '\0') {
!                 (void) write(2, s, (unsigned)strlen(s));
                  (void) write(2, ": ", 2);
          }
          (void) write(2, c, (unsigned)strlen(c));
          if (t_errno == TSYSERR) {
+                 c = strerror(errnum);
                  (void) write(2, ": ", 2);
!                 (void) write(2, c, (unsigned)strlen(c));
!         }
          (void) write(2, "\n", 1);
          return (0);
  }