[Patch] Move pback members from basic_streambuf to basic_filebuf

[Paolo Carlini]

Andreas Tobler wrote:

> Hi Paolo,
>
> what do we miss here?
> All are from the same type. This is on darwin. Though I saw it in the 
> testresults of others as well.
>
> /Volumes/xufs/gcc-cvs/gcc/libstdc++-v3/testsuite/27_io/basic_ios/3.cc:136: 
> error: no matching template for `std::basic_streambuf<gnu_char_type, 
> std::char_traits<gnu_char_type> >::_S_pback_size' found^M
> compiler exited with status 1

Just give me a few minutes and I will fix it. It's trivial just

     
s/std::basic_streambuf<gnu_char_type>::_S_pback_size/std::basic_filebuf<gnu_char_type>::_S_pback_size

in all those testcases.

Paolo.