Export Objects: Don't double increment count

Don't double increment the count when saving all Export Objects,
which effectively halves the maximum number allowed.

ui/qt/models/export_objects_model.cpp

@@ -190,7 +190,6 @@ void ExportObjectModel::saveAllEntries(QString path)
             }
             filename = QString::fromUtf8(safe_filename->str);
             g_string_free(safe_filename, TRUE);
-            count++;
         } while (save_dir.exists(filename) && ++count < prefs.gui_max_export_objects);
         eo_save_entry(save_dir.filePath(filename).toUtf8().constData(), entry);
     }