Add check to playlist name changed callback to avoid un-needed work.
Add check to playlist name changed callback to avoid un-needed work.

andyvand/cocoalibspotify,andyvand/cocoalibspotify,andyvand/cocoalibspotify,spectralmind/cocoalibspotify,yingwang/Fspot,CrowdTunes/cocoalibspotify,spotify/cocoalibspotify,spotify/cocoalibspotify,yingwang/Fspot,CrowdTunes/cocoalibspotify,CrowdTunes/cocoalibspotify,spotify/cocoalibspotify,CrowdTunes/cocoalibspotify,spectralmind/cocoalibspotify,spectralmind/cocoalibspotify,spotify/cocoalibspotify,andyvand/cocoalibspotify,spectralmind/cocoalibspotify,yingwang/Fspot