message: Put missing `_log` back into `FontAtlasImpl`
diff: @@ -102,7 +102,7 @@ interface CachedGlyph {
  abstract class FontAtlasPageBase<CG extends CachedGlyph> {
  - // private _log: Logger = null;
  + private _log: Logger = null;
  protected _pageCanvas: HTMLCanvasElement = null;
  protected _pageCtx: CanvasRenderingContext2D = null;
  