Fix build for newer versions of GCC

* build with newer gcc 11
* backported 7c2826cbc0
This commit is contained in:
mckaygerhard 2023-01-05 09:25:04 -04:00
parent 2e7be0b9f1
commit b920208550

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@ -31,6 +31,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include <list>
#include <vector>
#include <set>
#include <memory>
class MapBlock;
class ServerEnvironment;