SiteLogoImage to RootWeb
By Anatoly Mironov
If you click on the site logo, as default you go to the current spweb’s default.aspx page. If you want to override this, locate:
<SharePoint:SPLinkButton
runat="server"
NavigateUrl="~site/"
id="onetidProjectPropertyTitleGraphic" >
```Change ~site to ~sitecollection:
<SharePoint:SPLinkButton runat=“server” NavigateUrl="~sitecollection/" id=“onetidProjectPropertyTitleGraphic” >