ass_parse: remove 2 unused variables

Fallout from the previous commits.
configure.ac: Treat DragonFly as the rest of BSDs
Fix integer overflow in FT_Outline
Merge pull request #116 from hadvaid/dragonfly

configure.ac: Treat DragonFly as the rest of BSDs
Merge pull request #119 from MrSmile/fix-drawing-overflow

Fix integer overflow in FT_Outline
Fix \fade(7-argument version) parse
Close gaps in borders of self-intersecting glyphs

If the glyph is self-intersecting, so are the stroke
borders produced by stroking it. Normally, there is an
"inside" and an "outside" stroke border, but they swap
roles around self-intersections, the "inside" one going
on the outside while the "outside" one stays inside.
Currently, we take only the "outside" border, which thus
hides behind the main glyph around self-intersections.

Keep both stroke borders instead.

NOPE: this gives only a thick path around the edges
of the glyph, which breaks blur.
stroke_outline: merge original and stroked outline to fix blur
fix_freetype_stroker: ensure overall clockwise direction

The stroked outline's overall direction is always clockwise, so we
need this to be able to correctly add it to the original outline.