Fix url image wysiwyg multiview store

[Axepih]

Hi

Openmage 20.11.0

In app/code/core/Mage/Cms/Helper/Wysiwyg/Images.php

function getImageHtmlDeclaration

You have this path
$mediaPath = str_replace(Mage::getBaseUrl('media'), '', $fileurl);

In multi store with different url, this line cause issues on images

Recommended correction for the time being, if you have anything better, I'd be delighted
$mediaPath = str_replace(Mage::app()->getStore($this->_storeId)->getBaseUrl('media'), '', $fileurl);