[Patch] Fix -Werror fallout in binutils/winduni.c (and fix a FIXME)

[Danny Smith <danny_smith_0000@yahoo.co.nz>]

With -Werror, I now  get error for unused variables 's' and 'w' in
binutils/winduni.c when _WIN32 is defined. The following patch fixes. It
also removes a FIXME that needs to be fixed on the way to providing
support for multibyte code pages on windows. 

No testsuite regressions.

Danny

ChangeLog
2005-03-24  Danny Smith  <dannysmith@users.sourceforge.net>

	* winduni.c (unicode_from_ascii): Don't declared variables
	's' and 'w' if _WIN32.  Use MultiByteToWideChar to set the unicode
	string len.

Index: winduni.c
===================================================================
RCS file: /cvs/src/src/binutils/winduni.c,v
retrieving revision 1.3
diff -c -3 -p -r1.3 winduni.c
*** winduni.c	14 Sep 2003 12:20:17 -0000	1.3
--- winduni.c	24 Mar 2005 10:29:50 -0000
*************** void
*** 43,67 ****
  unicode_from_ascii (int *length, unichar **unicode, const char *ascii)
  {
    int len;
    const char *s;
    unsigned short *w;
  
    len = strlen (ascii);
- 
-   if (length != NULL)
-     *length = len;
- 
    *unicode = ((unichar *) res_alloc ((len + 1) * sizeof (unichar)));
- 
- #ifdef _WIN32
-   /* FIXME: On Windows, we should be using MultiByteToWideChar to set
-      the length.  */
-   MultiByteToWideChar (CP_ACP, 0, ascii, len + 1, *unicode, len + 1);
- #else
    for (s = ascii, w = *unicode; *s != '\0'; s++, w++)
      *w = *s & 0xff;
    *w = 0;
  #endif
  }
  
  /* Print the unicode string UNICODE to the file E.  LENGTH is the
--- 43,74 ----
  unicode_from_ascii (int *length, unichar **unicode, const char *ascii)
  {
    int len;
+ #ifndef _WIN32
    const char *s;
    unsigned short *w;
  
    len = strlen (ascii);
    *unicode = ((unichar *) res_alloc ((len + 1) * sizeof (unichar)));
    for (s = ascii, w = *unicode; *s != '\0'; s++, w++)
      *w = *s & 0xff;
    *w = 0;
+ #else
+   /* We use  MultiByteToWideChar rather than strlen to get the unicode
+      string length to allow multibyte "ascii" chars. The value returned
+      by this function includes the trailing '\0'.  */
+   len = MultiByteToWideChar (CP_ACP, 0, ascii, -1, NULL, 0);
+   if (len)
+     {
+       *unicode = ((unichar *) res_alloc (len * sizeof (unichar)));
+       MultiByteToWideChar (CP_ACP, 0, ascii, -1, *unicode, len);
+     }
+   /* Discount the trailing '/0'.  If MultiByteToWideChar failed,
+      this will set *length to -1.  */
+   len--;
  #endif
+ 
+   if (length != NULL)
+     *length = len;
  }
  
  /* Print the unicode string UNICODE to the file E.  LENGTH is the

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