mi: removing MPX ifdefs

global sprite renaming in mipointer and misprite
	fixed: multiple remove cursor call in miSpriteInstallColormap
	fixed: wrong core pointer usage in miSpriteStoreColors

dix:    bugfix in CheckCursorConfinement
	removing MPX ifdefs
	removing MPX event generation (using Xi solely now)
	bugfix GrabDevice: uninitialized field in grab struct caused segfault

xfree86: removing MPX fdefs

Xi:     removing MPX protocol events

dix/devices.c

@@ -497,6 +497,9 @@ CloseDevice(register DeviceIntPtr dev)
     while (dev->xkb_interest)
 	XkbRemoveResourceClient((DevicePtr)dev,dev->xkb_interest->resource);
 #endif
+    
+    if (DevHasCursor(dev))
+        xfree((pointer)dev->pSprite);
 
     xfree(dev->sync.event);
     xfree(dev);