Feature #2072 ยป 0036-client-Clear-city-aarea-references-before-destroying.patch
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if (packet->index == 0) {
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/* First access area packet. Clear old set. */
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/* Make sure no city refers to the old set. */
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city_list_iterate(plr->cities, pcity) {
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pcity->aarea = nullptr;
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} city_list_iterate_end;
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area_list_clear_plr(plr);
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alist = aarea_list_new();
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