is_string.i4.v = is_string_common_transform_c(common_index.i4.v)

	This routine determines if a common transform index is intended
	for scaling to a string as opposed to a floating point value.

	common_index	common transform index

	This function returns status values as follows:

	TRUE			scaled to a string
	FALSE			scaled to a floating point value

	This function requires the following include files:

	clib_h, cnsparam_h

	Related functions:

	is_linear_common_transform_c, is_interpolated_common_transform_c,
	is_unscalable_primary_transform_c, common_transform_num_const_c,
	pdudpu, pdudpu_ext, pdudcu, pdudcu_ext, pdpucu, pdpucu_ext, pdpucu8,
	pdcupu, pdcupu_ext, pdcupu8, pdcuud, pdcuud8, pcpuud, pdimax, pdulen,
	pdb_valid_length_c, pdb_scaling_table_limits_c

	C/C++ usage:

	int	is_string;
	int	common_index = 20;

	is_string = is_string_common_transform_c(common_index);