extern re_ErrorHandler XXX_API re_GetErrorHandler(void);
extern re_wErrorHandler XXX_API re_wGetErrorHandler(void);
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Pointer to a set private error handler if set by re_SetErrorhandler() or re_wSetErrorhandler().
The function re_GetErrorHandler() returns the address of the previously set private error function.
If there has been no setting of an error handler the function returns NULL.