[gdk-pixbuf] tests: define MAP_ANONYMOUS if it's not already

[Ryan Lortie <desrt src gnome org>]

commit 4122ab204a6934672386e5fa9add122241471641
Author: Ryan Lortie <desrt desrt ca>
Date:   Sat Dec 27 21:07:27 2014 -0500

    tests: define MAP_ANONYMOUS if it's not already
    
    MAP_ANONYMOUS is not part of POSIX and some other systems (like Mac OS)
    call it MAP_ANON.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=741933

 tests/pixbuf-readonly-to-mutable.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/tests/pixbuf-readonly-to-mutable.c b/tests/pixbuf-readonly-to-mutable.c
index 456f5a2..c47de7a 100644
--- a/tests/pixbuf-readonly-to-mutable.c
+++ b/tests/pixbuf-readonly-to-mutable.c
@@ -27,6 +27,12 @@
 #endif
 
 #ifdef G_OS_UNIX
+
+/* see https://bugzilla.gnome.org/show_bug.cgi?id=741933 */
+#ifndef MAP_ANONYMOUS
+#define MAP_ANONYMOUS MAP_ANON
+#endif
+
 typedef struct {
   void *buf;
   gsize len;