Returns the ordinal number of the entry point index number supplied as idx. You need the ordinal number because get_entry() and get_entry_name() use it.
Examples:
#include <entry.hpp>
// Display the ordinal number for all entry points
for (int e = 0; e < get_entry_qty(); e++)
msg("Ord # for %d is %d\n", e, get_entry_ordinal(e));