a shot in the dark to work-around windows file-import limit.

When importing to new tracks, newly created tracks are selected

Editor::track_selection_changed()
-> SoundFileOmega::reset()
-> SoundFileOmega::reset_options()
-> check_info() fails ->  Glib::signal_idle() error message.

it is unclear why check_info would fail in this case since it
worked in the first place..  best guess: a concurrency issue
opening the file.

gtk2_ardour/sfdb_ui.h

@@ -321,6 +321,9 @@ class SoundFileOmega : public SoundFileBrowser
 	void where_combo_changed ();
 
 	void do_something (int action);
+
+	bool _import_active;
+	bool _reset_post_import;
 };
 
 #endif // __ardour_sfdb_ui_h__