[gobject-introspection/msvc.improvements: 1/2] giscanner/scannerlexer.l: Include io.h on Windows

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

commit d2faab30b91ae54fb82bd4b964b9ef7df9e8dd60
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Tue Apr 30 16:03:24 2019 +0800

    giscanner/scannerlexer.l: Include io.h on Windows
    
    This is to compensate the for the lack of unistd.h on Visual Studio
    builds, and to avoid the compiler warning about the implicit declaration
    of access() as a result.  This is to also prepare for the next commit
    when we force-include msvc_recommended_pragmas.h from GLib on Visual
    Studio builds.

 giscanner/scannerlexer.l | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/giscanner/scannerlexer.l b/giscanner/scannerlexer.l
index bcce4397..cfec4d58 100644
--- a/giscanner/scannerlexer.l
+++ b/giscanner/scannerlexer.l
@@ -34,6 +34,8 @@
 #include <string.h>
 #ifndef _WIN32
 #include <limits.h>
+#else
+#include <io.h>
 #endif
 
 #include <glib.h>