Merge pull request #111 from yasserzubair/master

Update index.jsx

Author: ecmadao

src/components/ClassicTheme/index.jsx

@@ -45,7 +45,7 @@ class ClassicTheme extends React.PureComponent {
 
  handleFocusDropdownOnTime() {
  if (this.props.focusDropdownOnTime) {
- this.dropDown.current.scrollTop = this.dropDownActiveTime.current.offsetTop;
+ this.dropDown.current.scrollTop = this.dropDownActiveTime && this.dropDownActiveTime.current && this.dropDownActiveTime.current.offsetTop || 0;
  }
  }