don't render ALT="" as "*"

[jidanni@xxxxxxxxxxx]

Please make w3m not render a "*" for <img alt="" ...> or with no 'alt'
at all. Is there an HTML standard that says this is correct? If so
then you leave a page author no way to print nothing there if he
really wants to.

See http://en.wikipedia.org/wiki/Template:Rating
w3m:
  {{Rating|4|5}} displays as 4/5 stars****
lynx:
  {{Rating|4|5}} displays as 4/5 stars

Can you believe this was after I got them to fix
http://en.wikipedia.org/wiki/Template_talk:Rating#Accessibility_issue
and I was lucky to test in both lynx and w3m, otherwise the
coincidence of this being about "stars" would make me think their page
was still broken, when in fact it was w3m!