xwin: fix missing include of mi/mi_priv.h

xwin relies on mi_priv.h being included indirectly, thus depending
on exact include within other header files. This can easily break if
something in other headers slightly changes.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>

hw/xwin/winmultiwindowshape.c

@@ -33,6 +33,8 @@
 #include <xwin-config.h>
 #endif
 
+#include "mi/mi_priv.h"
+
 #include "win.h"
 
 /*

hw/xwin/winmultiwindowwindow.c

@@ -36,6 +36,8 @@
 #include <xwin-config.h>
 #endif
 
+#include "mi/mi_priv.h"
+
 #include "win.h"
 #include "dixevents.h"
 #include "winmultiwindowclass.h"

hw/xwin/winwindow.c

@@ -32,6 +32,9 @@
 #ifdef HAVE_XWIN_CONFIG_H
 #include <xwin-config.h>
 #endif
+
+#include "mi/mi_priv.h"
+
 #include "win.h"
 
 /*