error.c: don't leak upon realloc failure

[Jim Meyering]

Here's a proposed patch to avoid a leak in the unusual event
that realloc is used, and fails.

2004-04-20  Jim Meyering  <address@hidden>

        * error.c (error_tail): Don't leak upon realloc failure.

Index: gettext-tools/lib/error.c
===================================================================
RCS file: /cvs/gettext/gettext/gettext-tools/lib/error.c,v
retrieving revision 1.5
diff -u -p -r1.5 error.c
--- gettext-tools/lib/error.c   24 Aug 2003 19:50:42 -0000      1.5
+++ gettext-tools/lib/error.c   20 Apr 2004 07:36:41 -0000
@@ -1,5 +1,5 @@
 /* Error handler for noninteractive utilities
-   Copyright (C) 1990-1998, 2000-2003 Free Software Foundation, Inc.
+   Copyright (C) 1990-1998, 2000-2004 Free Software Foundation, Inc.
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2, or (at your option)
@@ -197,21 +197,23 @@ error_tail (int status, int errnum, cons
            wmessage = (wchar_t *) alloca (len * sizeof (wchar_t));
          else
            {
+             char *p;
              if (wmessage != NULL && len / 2 < ALLOCA_LIMIT)
                wmessage = NULL;
 
-             wmessage = (wchar_t *) realloc (wmessage,
-                                             len * sizeof (wchar_t));
+             p = (wchar_t *) realloc (wmessage, len * sizeof (wchar_t));
 
-             if (wmessage == NULL)
+             if (p == NULL)
                {
+                 free (wmessage);
                  fputws_unlocked (L"out of memory\n", stderr);
                  return;
                }
+             wmessage = p;
            }
 
          memset (&st, '\0', sizeof (st));
-         tmp =message;
+         tmp = message;
        }
       while ((res = mbsrtowcs (wmessage, &tmp, len, &st)) == len);