[DF][NFC] No need to default-initialize a std::array
[DF][NFC] No need to default-initialize a std::array

We set its values in the ctor body.

olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root