message: Correct optionsobject properties used for shadow correction.
diff: @@ -3273,7 +3273,7 @@ var PptxGenJS = function(){
  // OPT: `type`
  if ( opt.shadow.type != 'outer' && opt.shadow.type != 'inner' ) {
  console.warn('Warning: shadow.type options are `outer` or `inner`.');
  - opt.type = 'outer';
  + opt.shadow.type = 'outer';
  }
  // OPT: `angle`
  @@ -3285,7 +3285,7 @@ var PptxGenJS = function(){
  }
  // B: ROBUST: Cast any type of valid arg to int: '12', 12.3, etc. -> 12
  - opt.angle = Math.round(Number(opt.shadow.angle));
  + opt.shadow.angle = Math.round(Number(opt.shadow.angle));
  }
  // OPT: `opacity`
  @@ -3297,7 +3297,7 @@ var PptxGenJS = function(){
  }
  // B: ROBUST: Cast any type of valid arg to int: '12', 12.3, etc. -> 12
  - opt.opacity = Number(opt.shadow.opacity)
  + opt.shadow.opacity = Number(opt.shadow.opacity)
  }
  }
  