TinyMCE throws error on mousedown (error in wpEditImage)

[joehoyle]

In trunk, a JS error in thrown in your mousedown on an element that is not an image and has no child elements.

This is due to the wpEditImage mousedown handler:

if ( e.target && (e.target.nodeName == 'IMG' || e.target.firstChild.nodeName == 'IMG') ) {

Steps to reproduce:

1. Create a new post, paste the folling into the HTML view

   <input type="text" value="foo" />
   

2. Switch to Visual, click on the input

Observed Result:
JS Error "Uncaught TypeError: Cannot read property 'nodeName' of null"

Attached patch to fix

Related: r18702

In [19180]:

Fix js error on mousedown in the editor, props joehoyle, fixes #19165