The code was generating a char ** of string representations of the
ks_tuple() array but it was not using it. We modify the code to:
1. extend the array returned by ks_tuple2str() to include
enough space for the trailing NULL and ensure that there
is a NULL at the end,
2. not free the array before exiting ks_tuple2str() as we
intend to use it in the caller,
3. re-organise the pointers in hdb_generate_key_set() to
make it more clear how we are to free things that have
been allocated.
4. free the char ** given us by ks_tuple2str() if it has
been allocated.
Signed-off-by: Nicolas Williams <nico@cryptonector.com>
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