PATCH (3.0.X branch): Allow C++ compilation with -Wshadow -Werror

[Loren James Rittle]

Reviewed by Benjamin, Paolo and myself.  Tested with no regressions on
i386-unknown-freebsd4.5 (rebuilt libstdc++-v3 from scratch) and
installed on 3.0.X branch.

> I agree this is the same issue discussed in libstdc++/3561.
(thus I have closed it with further analysis since now fixed on
 both mainline and branch.)

2002-01-28  Jens Rehsack <rehsack@web.de>

	libstdc++/3561
	* include/bits/ostream.tcc (__pad_char): Support -Wshadow -Werror.

Index: ostream.tcc
===================================================================
RCS file: /cvs/gcc/gcc/libstdc++-v3/include/bits/ostream.tcc,v
retrieving revision 1.2.2.5
diff -c -r1.2.2.5 ostream.tcc
*** ostream.tcc	2001/06/11 19:37:49	1.2.2.5
--- ostream.tcc	2002/01/28 20:22:26
***************
*** 487,497 ****
  	  // Pad after 0[xX], if there is one.
  	  // Who came up with these rules, anyway? Jeeze.
  	  typedef _Format_cache<_CharT> __cache_type;
! 	  __cache_type const* __fmt = __cache_type::_S_get(__ios);
  	  const char_type* __minus = traits_type::find(__olds, __oldlen, 
! 						       __fmt->_S_minus);
  	  const char_type* __plus = traits_type::find(__olds, __oldlen, 
! 						      __fmt->_S_plus);
  	  bool __testsign = __minus || __plus;
  	  bool __testhex = __olds[0] == '0' 
  	    		   && (__olds[1] == 'x' || __olds[1] == 'X');
--- 487,497 ----
  	  // Pad after 0[xX], if there is one.
  	  // Who came up with these rules, anyway? Jeeze.
  	  typedef _Format_cache<_CharT> __cache_type;
! 	  __cache_type const* __lfmt = __cache_type::_S_get(__ios);
  	  const char_type* __minus = traits_type::find(__olds, __oldlen, 
! 						       __lfmt->_S_minus);
  	  const char_type* __plus = traits_type::find(__olds, __oldlen, 
! 						      __lfmt->_S_plus);
  	  bool __testsign = __minus || __plus;
  	  bool __testhex = __olds[0] == '0' 
  	    		   && (__olds[1] == 'x' || __olds[1] == 'X');