fix calculation of industry CO2/CCS emissions

• splitting sety into fossil and biomass components db8b039 broke the calculation of o37_emiInd which was based on a one-to-one mapping of sety to fety
• keeping track of the share of sety in fety production explicitly in the calculation solves this issue
• this only affected variables of the Emi|C?CO2|FFaI|Industry group