fix mixin init hook scope
fix mixin init hook scope
weftio/Leaflet.TileLayer.PouchDBCached,eiriksfa/Leaflet.TileLayer.PouchDBCached,MazeMap/Leaflet.TileLayer.PouchDBCached,weftio/Leaflet.TileLayer.PouchDBCached,svr93/Leaflet.TileLayer.PouchDBCached-fork,svr93/Leaflet.TileLayer.PouchDBCached-fork,MazeMap/Leaflet.TileLayer.PouchDBCached,eiriksfa/Leaflet.TileLayer.PouchDBCached