Does Article 43 EC, read in conjunction with Article 48 EC (now Article 49 TFEU, read in conjunction with Article 54 TFEU), preclude a Member State from not allowing a resident company a tax exemption for interest income where an affiliated company within the same group established in another Member State is not entitled to a tax deduction for the corresponding interest expenditure as a result of rules (as in the present case) in the relevant Member State on interest deduction limitation in cases of thin capitalisation, where the Member State allows a resident company a tax exemption for interest income in cases where an affiliated company within the same group in that same Member State is not allowed a tax deduction for the corresponding interest expenditure as a result of national rules (as in the present case) on interest deduction limitation in cases of thin capitalisation?