By Mateusz Rabiega GDANSK (Reuters) -The Polish arm of Santander Bank on Wednesday posted a 9% rise in its preliminary fourth-quarter net profit that just missed analyst expectations due to higher legal costs for foreign currency mortgage loans. Santander Bank Polska, the country’s second biggest lender by market capitalisation, said quarterly net profit rose to 980.1 million zlotys ($244 million), below the 1.01 billion zlotys expected by analysts in a Reuters poll. The lender said the cost of legal provisions for foreign currency mortgage loans was 1.01 billion zlotys compared with its earli…