chess.php: fix PHPStan warnings
chess.php: fix PHPStan warnings

> Parameter #2 $enable of function stream_set_blocking expects bool, int given.

Pass bools instead of implicity converting ints to bools.

hemberger/smr,hemberger/smr,smrealms/smr,smrealms/smr,hemberger/smr,hemberger/smr,smrealms/smr