intl 1.0.3: Trying to understand the internal error functions

Hi! intl_error.h defines common error handling functions and "global" variables - in addition to those in the respective objects. In order to "synchronize" global and individual errors, there are three functions (plural of error): intl_errors_reset intl_errors_set_custom_msg intl_errors_set_code However, the first and the third are NEVER referenced. The second is only used in connection with intl_error_set_code (note singular error!) All this seems not to add up. Are there any docs available somewhere? HPO