[PATCH] qemu-xen: fix unmapping logic in hw/xen_console.c

[Wei Liu <liuw@liuw.name>]

This is a patch for qemu-xen. Don't know if it is the right place to
post.

It has been fixed in upstream QEMU.

------8<----------------
commit 28ec10ef3ff22873cd3f1b703d3aecbc93cbf680
Author: Wei Liu <liuw@liuw.name>
Date:   Wed Jun 8 17:40:02 2011 +0800

    qemu-xen: fix unmapping logic in hw/xen_console.c.
    
    Signed-off-by: Wei Liu <liuw@liuw.name>

diff --git a/hw/xen_console.c b/hw/xen_console.c
index 0a2374c..d7099c4 100644
--- a/hw/xen_console.c
+++ b/hw/xen_console.c
@@ -258,7 +258,7 @@ static void con_disconnect(struct XenDevice *xendev)
     xen_be_unbind_evtchn(&con->xendev);
 
     if (con->sring) {
-        if (!xendev->dev)
+        if (!xendev->gnttabdev)
 	    munmap(con->sring, XC_PAGE_SIZE);
         else
             xc_gnttab_munmap(xendev->gnttabdev, con->sring, 1);