Comment 34 for bug 349914

(In reply to comment #28)
> If your concern future pango versions, then I suggest adding a compile-time
> version check on pango and setting the new methods instead of the deprecated
> new_font() and default_substitute().

We can use the new methods, but, if we do that, we need to have pre- and post-1.24 versions of the methods (regardless of the compile-time version), and do a run-time Pango version check.