* \param msg Error message or playlist info is returned here.
*
* \return The length of the loaded playlist on success, negative error code
* else. Files which are listed in the playlist, but are not contained in the
* database are ignored. This is not considered an error.
*/
* \param msg Error message or playlist info is returned here.
*
* \return The length of the loaded playlist on success, negative error code
* else. Files which are listed in the playlist, but are not contained in the
* database are ignored. This is not considered an error.
*/