Torrent example: fix crash

Yet Another Side Effect of not keeping iterator stability.

Although not idiomatic, the pattern

  while (i != e) {
    auto cur = i++;
    if (cond)
      erase(cur);
  }

was actually correct. Move to the idiomatic erase pattern
instead (it = cont.erase(it)).

The example still has memory problems all over the place on
shutdown. At least now it doesn't crash when running.

Change-Id: I30bd2c4e2b3fa7fe4e28d4426ff3d894b9bae103
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>

0 files changed, 0 insertions, 0 deletions