Bug#542434: error message should say why cannot load font

[jidanni@jidanni.org]

Package: xterm
Version: 244-2
Severity: wishlist
X-debbugs-cc: dickey@his.com

Please add better error messages than just
       xterm: cannot load font -wenquanyi-wenquanyi-medium-ri-normal--0-0-0-0-p-0-big5-0
as all the user knows is 'xlsfonts(1) said it was available, so that's
what I stuck into .Xresources.'

E.g., mention something like
      Regardless of your locale and encoding, you need an ISO-10646-1 font to display the result.
like it says on the man page.