Add a call to cdio_get_media_changed in RipCD::CheckCDIOIsValid

This prevents an erroneous message that the media has changed the first
time the ripCD dialog is used.

src/ui/ripcd.cpp

@@ -413,6 +413,9 @@ bool RipCD::CheckCDIOIsValid() {
     cdio_destroy(cdio_);
   }
   cdio_ = cdio_open(NULL, DRIVER_UNKNOWN);
+  // Refresh the status of the cd media. This will prevent unnecessary
+  // rebuilds of the track list table.
+  cdio_get_media_changed(cdio_);
   return (cdio_);
 }