assertion 'pcity->before_change_shields >= 0' failed.
Despite #47938 making the assert less strict, I still got in a S3_1 autogame, with variant2 ruleset.
Patch also for S2_6.
Despite #47938 making the assert less strict, I still got in a S3_1 autogame, with variant2 ruleset.
assertion 'pcity->before_change_shields >= 0' failed.