playlist: declare playlist_NodeAddInput() only once
playlist: declare playlist_NodeAddInput() only once

It is declared in <vlc_playlist.h>.

xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc