Patching utorrent slow ipfilter loading

When utorrent's ipfilter.dat, a file which filters out malicious ips in peer swarms, grows large, utorrent hangs at startup
I noticed this when I tried putting some new lists into the filter

A little reversing uncovers the issue

The ipfilter.dat ip range format looks like this (for ipv4)
1.2.3.4-5.6.7.8,0,test

This includes a start, an end, a priority level, and an optional description

The problem happens after utorrent parses ipfilter.dat, when it attempts to optimize it
It does so by trying to merge all the ip filter ranges together

the function is layed out like this:

sort(ipRanges)
for ipRange in ipRanges:
    if ipRange overlaps with the previous range:
        copy ipRanges[i:] to ipRanges[i-1:]

when there are many overlapping ranges, the copy operation (a memcpy) becomes very slow

obviously, when there are no overlapping ranges, the slow down does not occur

there are many ways to rewrite this, as long as only 1 range is copied every compare, the function will be fast

Patching this makes utorrent start-up fast again

I'm not sure if utorrent 3 has fixed this yet, but for those who are still using v2, here's a patch:
http://www.mediafire.com/?tto3p44mwvn5tfx