Allegro 4 adapter: slightly improved font sizing. Improve related macro.
Allegro 4 adapter: slightly improved font sizing. Improve related macro.

The font size is translated now to AllegTTF's points as 80% of the
value. Also, using ALLEGTTF_TTFSMOOTH flag instead of
ALLEGTTF_REALSMOOTH to make the appearance more similar to other
adapters and possibly slightly improve performance.
hydren/fgeal,hydren/fgeal,hydren/fgeal