Clean ups, abstract the widgets a bit, and don't segfault when not finding an unsuitable write mode.

experimental/ecdb/trunk/src/ecdb_burn.c

@@ -151,7 +151,7 @@ ecdb_burn_project(Ecdb_Burn_Project *proj)
       burn_write_opts_free(opts);
       ecdb_sources_list_free(data->sources);
       ecdb_tracks_list_free(data->tracks);
-      FREE(proj);
+      FREE(data);
       return ECDB_ERROR_WRITE_MODE;
    }