[Patch] Fix first part of libstdc++/13731

[Loren James Rittle]

> 2004-02-11  Paolo Carlini  <pcarlini@suse.de>

> 	PR libstdc++/13731 (first part: write)
> 	* config/io/basic_file_stdio.h (__basic_file<char>::xwrite):
> 	New, declare.
> 	* config/io/basic_file_stdio.cc (__basic_file<char>::xwrite):
> 	Define it: a wrapper around write() handling partial write.
> 	(__basic_file<char>::xsputn): Use it.
> 	(__basic_file<char>::xsputn_2): Likewise.

The change looks good to me.  Thanks Paolo.  - Loren