Front-end bug

[John Hsu <jonhsu@xxxxxxxxxxxxx>]

I have encountered another front end bug while trying to compile
libstdc++-v3. I've attached a simple test case.

> sgiCC -c localename.i

### Assertion failure at line 1117 of ../../g++fe/wfe_decl.cxx:
### Compiler Error during Writing WHIRL file phase:
### unexpected tree code ptrmem_cst
sgiCC INTERNAL ERROR:  /usr/lib/gcc-lib/ia64-sgi-linux/sgicc-1.0/gfecc
returned non-zero status 1

namespace std
{
  class locale
  {
  public:
     
    class _Impl;
  };


   
  class locale::_Impl
  {

  public:
     
    _Impl();

    void 
    _M_construct_collate(const char*);

    void 
    _M_construct_ctype(const char*);

    void 
    _M_construct_monetary(const char*);

    void 
    _M_construct_numeric(const char*);

    void 
    _M_construct_time(const char*);

    void 
    _M_construct_messages(const char*);
  };
}  

namespace std {
  locale::_Impl::
  _Impl()
  {
    static void(_Impl::* ctors[]) (const char*) = 
    {
       
      &locale::_Impl::_M_construct_collate,
      &locale::_Impl::_M_construct_ctype,
      &locale::_Impl::_M_construct_monetary,
      &locale::_Impl::_M_construct_numeric,
      &locale::_Impl::_M_construct_time,
      &locale::_Impl::_M_construct_messages,
      0
    };
  }
}