Assertion in load_animations: m_animations not empty

[Nicolai Hähnle]

The second time animations are loaded, an assertion is sometimes triggered:
widelands: ...src/graphic/graphic.cc:1015: void Graphic::load_animations(UI::ProgressWindow&): Assertion `m_animations.empty()' failed.

The following steps reproduce this reliably for me with r5855:
1. Start a single player game on "Crater" with default settings.
2. Exit the single player game.
3. Go to Editor -> New game
4. The assertion is triggered while the editor is loading animations

I have also seen this happen when trying to load a replay just after finishing a network game.

I'm targeting it to build16-rc1 for now, because we should definitely try to get rid of known crashes for the release...

[Hans Joachim Desserud (hjd)]

Happens here as well when I follow your instructions.

[Nicolai Hähnle (nha)]

Should be fixed in r5871.

[SirVer (sirver)]

Released in build16-rc1