bug in ags-0.4.2-22

affected function is probably ags_audio_open_files() during patching occured a mistake ...

Further API gets some modification file IO stays the same.

to be added:

• ags_line_map_recall()

and must be implemented by

• AgsPanelInputLine
• AgssMixerInputLine
• AgsDrumInputLine
• AgsDrumOuputLine
• AgsSynthInputLine

...

further find_port() in AgsMachineClass, AgsPadClass and AgsLineClass to be implemented