`font-spec` unable to retrieve :name of font

[Alexis <flexibeast@gmail.com>]

Hi all,

Having tried various alternatives, i now use Inconsolata-g as my 
preferred general Emacs font:

    http://leonardo-m.livejournal.com/77079.html

using Xft as my Emacs font backend.

In trying to use the `company-quickhelp` package, however, i 
discovered that it wasn't working due to a call to `pos-tip-show`, 
which in turn essentially calls:

    (font-spec :name (frame-parameter (window-frame 
    (selected-window)) 'font))

This call results in:

    (error "Invalid font name: 
    -unknown-Inconsolata-g-normal-normal-normal-*-13-*-*-*-m-0-iso10646-1")

which is, of course, due to the dash in the font name; the X 
Logical Font Description Conventions:

    http://www.x.org/releases/X11R7.6/doc/xorg-docs/specs/XLFD/xlfd.html#fontname_syntax

exclude the dash/hyphen as a valid in-field character.

What, if anything, can be done about this? Should this be 
considered a bug, or "working as intended"?


Alexis.