qemu: hotplug: Report error if we hit tray status timeout

If we exceed the timeout waiting for the tray status to change,
we don't report an error. Fix it

(cherry picked from commit 1fad65d4)

src/qemu/qemu_hotplug.c

@@ -225,7 +225,13 @@ qemuDomainChangeEjectableMedia(virQEMUDriverPtr driver,
             goto error;
 
         while (disk->tray_status != VIR_DOMAIN_DISK_TRAY_OPEN) {
-            if (virDomainObjWaitUntil(vm, now + CHANGE_MEDIA_TIMEOUT) != 0)
+            int wait_rc = virDomainObjWaitUntil(vm, now + CHANGE_MEDIA_TIMEOUT);
+            if (wait_rc > 0) {
+                virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                               _("timed out waiting for "
+                                 "disk tray status update"));
+            }
+            if (wait_rc != 0)
                 goto error;
         }
     } while (rc < 0);