[pango] tests/markup-parse.c: Fix build on Visual Studio

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

commit 08649ce12fb7ea41928a17f05fa1916cbe44361c
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Mon Mar 19 20:54:23 2018 +0800

    tests/markup-parse.c: Fix build on Visual Studio
    
    Visual Studio does not ship with a unistd.h, so include the proper
    header on Windows when unistd.h is not found on Windows.

 tests/markup-parse.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)
---
diff --git a/tests/markup-parse.c b/tests/markup-parse.c
index e82c6db..633f3e8 100644
--- a/tests/markup-parse.c
+++ b/tests/markup-parse.c
@@ -21,7 +21,13 @@
 
 #include <glib.h>
 #include <string.h>
-#include <unistd.h>
+
+#ifdef G_OS_WIN32
+# include <io.h>
+#else
+# include <unistd.h>
+#endif
+
 #include <locale.h>
 
 #include <pango/pangocairo.h>