XQuartz: RandR: Respond better to resolution changes made outside X

Signed-off-by: Jeremy Huddleston <jeremyhu@apple.com>

hw/xquartz/darwinEvents.c

@@ -52,6 +52,7 @@ in this Software without prior written authorization from The Open Group.
 #include "darwin.h"
 #include "quartz.h"
 #include "quartzKeyboard.h"
+#include "quartzRandR.h"
 #include "darwinEvents.h"
 
 #include <sys/types.h>
@@ -276,7 +277,12 @@ static void DarwinEventHandler(int screenNum, InternalEvent *ie, DeviceIntPtr de
             break;
             
         case kXquartzDisplayChanged:
+            DEBUG_LOG("kXquartzDisplayChanged\n");
             QuartzUpdateScreens();
+#ifdef RANDR
+            /* Update our RandR info */
+            QuartzRandRUpdateFakeModes(TRUE);
+#endif
             break;
             
         default: