directly test against SECP256K1_EC_COMPRESSED for length
directly test against SECP256K1_EC_COMPRESSED for length

Bit-Wasp/secp256k1-php,Bit-Wasp/secp256k1-php,Bit-Wasp/secp256k1-php,Bit-Wasp/secp256k1-php,Bit-Wasp/secp256k1-php