Comment 17 for bug 1651591

Same issue reported on the forum for the new Frisians scenario:

"There is one spot of bother. The stormflood consumes lots of memory; the further it progresses, the more memory is flooded. In the end, it sometimes gets so bad that Widelands no longer responds and I have to force-close it. I´m unable to find the reason for this…"

So, we should try to do something about this for Build 20.