create_custom_data

Convert the current item to a custom data type
     ea   - linear address
     size - size of the item
     dtid - custom data type id (see @hlpIdcfind_custom_data_type[find_custom_data_type])
     fid  - custom data format id (see @hlpIdcfind_custom_data_format[find_custom_data_format])
returns: 1-ok, 0-failure
This is a convenience macro, see also @hlpIdccreate_data[create_data]() function

#define create_custom_data(ea, size, dtid, fid) create_data(ea, FF_CUSTOM, size, dtid|((fid)<<16))