複合型格子属性の、グループの数を取得する。
call cg_iric_read_complex_count_withgridid(fid, gid, type, num, ier)
ier = cg_iRIC_Read_Complex_Count_WithGridId(fid, gid, type, &num);
num = cg_iRIC_Read_Complex_Count_WithGridId(fid, gid, type)