broadway: Only use gio-unix on G_OS_UNIX

configure.ac

@@ -382,7 +382,9 @@ AC_SUBST(DISABLE_ON_QUARTZ)
 if test "x$enable_broadway_backend" = xyes; then
   GDK_BACKENDS="$GDK_BACKENDS broadway"
   cairo_backends="$cairo_backends cairo"
-  have_gio_unix=yes
+  if test "$os_unix" = "yes"; then
+    have_gio_unix=yes
+  fi
   GDK_WINDOWING="$GDK_WINDOWING
 #define GDK_WINDOWING_BROADWAY"
   GDK_EXTRA_LIBS="$GDK_EXTRA_LIBS -lz"

gdk/broadway/broadwayd.c

@@ -10,7 +10,9 @@
 
 #include <glib.h>
 #include <gio/gio.h>
+#ifdef G_OS_UNIX
 #include <gio/gunixsocketaddress.h>
+#endif
 
 #include "broadway-server.h"
 

gdk/broadway/gdkbroadway-server.c

@@ -12,7 +12,9 @@
 
 #include <glib.h>
 #include <glib/gprintf.h>
+#ifdef G_OS_UNIX
 #include <gio/gunixsocketaddress.h>
+#endif
 #include <stdlib.h>
 #include <string.h>
 #include <errno.h>