c_io_stdio.h (streamsize): Make it a typedef for ptrdiff_t.

	* config/c_io_stdio.h (streamsize): Make it a typedef for
	ptrdiff_t.
	(wstreamsize): Likewise.

From-SVN: r37496

libstdc++-v3/ChangeLog

 2000-11-16  Mark Mitchell  <mark@codesourcery.com>
 
+	* config/c_io_stdio.h (streamsize): Make it a typedef for
+	ptrdiff_t.
+	(wstreamsize): Likewise.
+
 	* config/c_io_stdio.h: Include libio.h.
 
 Wed Nov 15 18:39:34 2000  Mark P Mitchell  <mark@codesourcery.com>

libstdc++-v3/config/c_io_stdio.h

@@ -45,10 +45,10 @@ namespace std {
 
 // from fpos.h
   typedef long  	streamoff;
-  typedef size_t 	streamsize; // Signed integral type
+  typedef ptrdiff_t	streamsize; // Signed integral type
 #if _GLIBCPP_USE_WCHAR_T
   typedef long  	wstreamoff;
-  typedef size_t 	wstreamsize;
+  typedef ptrdiff_t	wstreamsize;
 #endif
   typedef fpos_t  	__c_streampos;