hall_of_fame_player_detail.php: simplify with ??
hall_of_fame_player_detail.php: simplify with ??

Use the null coalescing operator to simplify the definitions of the
local `$game_id` and `$account_id` variables.

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