Fix compilation errors building with titan 9.0.0:
CommonDefs.ttcn:1298.12-23: error: Reference to a value was expected instead of template variable `v_Substring1'
CommonDefs.ttcn:1298.12-31: In the right operand of operation `&':
CommonDefs.ttcn:1298.27-31: error: Reference to a value was expected instead of template parameter `p_Bit'
CommonDefs.ttcn:1298.12-46: In the right operand of operation `&':
CommonDefs.ttcn:1298.35-46: error: Reference to a value was expected instead of template variable `v_Substring2'