fix(StopLayer): fix tile creation

Author: landonreed

lib/scenario-editor/components/StopLayer.js

@@ -21,13 +21,14 @@ export default class StopLayer extends GridLayer {
     console.log('creating GridLayer', gl)
     return gl
   }
-  createTile = (coords, done) => {
+  createTile = (coords) => {
     const {map} = this.context
     const {minZoom, stops} = this.props
     if (coords.z < minZoom) return // don't draw every transit stop in a country
 
     // create a <canvas> element for drawing
     const tile = document.createElement('canvas')
+    tile.width = tile.height = TILE_LENGTH
     this.drawTile(tile, coords, map, stops)
     return tile
   }