[ic] Edit bug with checkout.html

[scm@apdo.com]

I found an error with UI page editor, 
if you save  /order/checkout.html file with the Page editor , even without
any change, it not longer works, and if you try to edit again returns this
error:

Template read error reading ''. 
template: ; t_file=templates/
 
I see the same error with demo store in interchage web site.

best regards
Salvador Caballe