[start of port to win32/msvc] HAVE_UNIST_H and _pipe() only include

[start of port to win32/msvc] HAVE_UNIST_H and _pipe() only include

2007-12-03  Hans Breuer  <hans@breuer.org>

	[start of port to win32/msvc]
	* gcancellable.c : HAVE_UNIST_H and _pipe()
	* gcontenttype.c : only include <dirent.h> in the UNIX branch
	* gdatainputstream.c : pointer arithmetic on void* is a gcc extension
	* gdummyfile.c glocalfileinputstream.c gsimpleasyncresult.c : use
	HAVE_UNIST_H
	* glocalfileoutputstream.c : use HAVE_UNIST_H and s/ssize_t/gssize/
	* glocalvfs.c : use HAVE_PWD_H
	* gio.symbols : ifdef unix specific functions with G_OS_UNIX
	* makefile.msc : new file (maybe later converted to makefile.msc.in)
	* Makefile.am : added to EXTRA_DIST

svn path=/trunk/; revision=6027