PVS-Studio warning V547 for TortoiseSVN

int main(int argc, char **argv)
{
  ....
  DWORD ticks;
  ....
  if (run_timers(now, &next)) {
    ticks = next - GETTICKCOUNT();
    if (ticks < 0) ticks = 0;
  } else {
    ticks = INFINITE;
  }
  ....
}

This suspicious code was found in TortoiseSVN project by PVS-Studio static code analyzer.
Warning message is:
V547 Expression 'ticks < 0' is always false. Unsigned type value is never < 0. winplink.c 635

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