Bug#871037: UH leaks

[Petter Reinholdtsen]

Here is a tested quilt patch to be stored in
debian/patches/1000-icon-mem-leak.patch.

I could not verify that all leaks are plugged, as the program is
still increasing in size while playing, and I do not know if this
is normal or not.  But the code in question make sense and is from
upstream, so it should at least reduce the amount of memory used. :)

I tested with the patch in place, and the game is working as it should.
I was not able to trigger the slowdown, but do not know if I played
long enough. :)

-- 
Happy hacking
Petter Reinholdtsen
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