xpaint is broken on freebsd 4.11

[B. Levin]

on /usr/ports/graphics/xpaint:

% make
...

misc.c: In function `mousewheelScroll':
misc.c : 675 :  structure has no member named `scroll_mode'
*** Error code 1

Stop in /usr/ports/graphics/xpaint/work/xpaint-2.7.6.
*** Error code 1