[gtk+] Don't include unistd.h unconditionally

[Chun-wei Fan <fanchunwei src gnome org>]

commit a32be5d7e6346f704876e49bb647d3579ac8a93e
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Wed Jul 13 15:27:28 2011 +0800

    Don't include unistd.h unconditionally

 gtk/a11y/gtktextviewaccessible.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/gtk/a11y/gtktextviewaccessible.c b/gtk/a11y/gtktextviewaccessible.c
index 809a5a9..d0fa153 100644
--- a/gtk/a11y/gtktextviewaccessible.c
+++ b/gtk/a11y/gtktextviewaccessible.c
@@ -20,7 +20,11 @@
 #include "config.h"
 
 #include <sys/types.h>
+
+#ifdef HAVE_UNISTD_H
 #include <unistd.h>
+#endif
+
 #include <string.h>
 #include <stdlib.h>
 #include <glib-object.h>