xquartz: fix compilation

Fixes #1788

Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1777>

hw/xquartz/X11Controller.m

@@ -52,6 +52,8 @@
 #include <asl.h>
 #include <stdlib.h>
 
+#include "dix_priv.h"
+
 extern aslclient aslc;
 extern char *bundle_id_prefix;
 

hw/xquartz/applewm.c

@@ -387,7 +387,7 @@ ProcAppleWMSetWindowMenu(register ClientPtr client)
         return BadAlloc;
     }
 
-    max_len = (client->req-len << 2) - sizeof(xAppleWMSetWindowMenuReq);
+    max_len = (client->req_len << 2) - sizeof(xAppleWMSetWindowMenuReq);
     bytes = (char *)&stuff[1];
 
     for (i = j = 0; i < max_len && j < nitems;) {

hw/xquartz/darwin.c

@@ -70,6 +70,9 @@
 #define NO_CFPLUGIN
 #include <IOKit/hidsystem/IOHIDLib.h>
 
+#include "input_priv.h"
+#include "screenint_priv.h"
+
 #ifdef MITSHM
 #include "shmint.h"
 #endif

miext/rootless/rootlessWindow.c

@@ -37,6 +37,7 @@
 #include <X11/Xatom.h>
 
 #include "mi/mi_priv.h"
+#include "dix_priv.h"
 
 #ifdef __APPLE__
 #include <Xplugin.h>