gint pango_font_description_get_size ( const PangoFontDescription* desc )
The size field for the font description in points
or device units. You must call
pango_font_description_get_size_is_absolute() to find out
which is the case. Returns 0 if the size field has not previously
been set or it has been set to 0 explicitly.
pango_font_description_get_set_fields() to find out
if the field was explicitly set or not.