Rusty Russell 4b48a43106 doc: document the length requirements of output parameter.
It's subtle, since it is actually only touched by hashfp (though
we assert it's non-NULL), but give explicit advice in the default
case.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2020-02-10 11:11:11 +10:30
..