Zoltan_Hash : hash a global or local ID into non-negative integers
| Arguments: | |
| key | A pointer to the ID to be hashed. |
| num_id_entries | The length of the ID (as given by NUM_GID_ENTRIES or NUM_LID_ENTRIES). |
| n | The computed hash value will be between 0 and n-1. |
| Return Value: | |
| unsigned int | The hash value (between 0 and n-1). |