usb-host: reapurb error report fix

Don't report errors on devices which are in disconnected
and closing state.
diff --git a/usb-linux.c b/usb-linux.c
index 4e4df61..12e8772 100644
--- a/usb-linux.c
+++ b/usb-linux.c
@@ -312,9 +312,11 @@
                 }
                 return;
             }
-            if (errno == ENODEV && !s->closing) {
-                trace_usb_host_disconnect(s->bus_num, s->addr);
-                do_disconnect(s);
+            if (errno == ENODEV) {
+                if (!s->closing) {
+                    trace_usb_host_disconnect(s->bus_num, s->addr);
+                    do_disconnect(s);
+                }
                 return;
             }