複合型格子属性の、実数(倍精度)型の条件の値を読み込む。
call cg_iric_read_complex_real(fid, type, num, name, value, ier)
ier = cg_iRIC_Read_Complex_Real(fid, type, num, name, &value);
value = cg_iRIC_Read_Complex_Real(fid, type, num, name)