Fixed Font Bug

The default font now loads properly.
Fixing stuff

Fixed: "FOR i = 0 TO 0 STEP 0" had wrong behaviour
Fixed: SETSCREEN does not ignore Fullscreen parameter anymore and the
width/height is set properly
Fixed: TYPE Foo; Bar; FUNCTION Asdf: Bar; RETURN Bar; ENDFUNCTION //
this returned the value of self.Bar instead of the value of the
parameter
Fixed: TYPE asdf; Foo; FUNCTION Bar: FOR Foo = 0 TO 10; NEXT; STDOUT
Foo; ENDFUNCTION; ENDTYPE // Implicit self in For should create new
local variable to maintain compatibility
Fixed: ZOOMSPRITE 0,0,0,-1,1 // position of image was not correct