Image dialog gives script errpr when focus in all of a link.

[Zoltan Koszegi]

Can be reproduced on DEMO page with IE9. With IE10 not an issue.

1. Clear DEMO page (I used full featured GUI with full screen) and make a link.
2. Click away from the link, and then double-click on it.
3. The Hyperlink dialog displays. Click OK or Cancel.
4. Without changing focus, click the Image tool.

RESULT: Error dialog displays these details.
Error: Object doesn't support property or method 'getName'
The error comes from: plugins\image\dialogs\image.js line 302 (in ver. 4.1.1) from here
var childTagName = linkChildren.getItem( 0 ).getName();