der_unpack() modifies dercursor

[vanrein]

der_unpack() modifies dercursor

[gijzelaerr]

ah i see it now in the API doc:

* The cursor will be updated by this call to point to the position
 * where unpacking stopped.  Refer to the return value to see if this is
 * an error position.  The function returns 0 on success and -1 on failure.
 * Upon failure, errno is also set, namely to EBADMSG for syntax problems
 * or ERANGE for lengths or tags that are out of the supported range of
 * this implementation.

But this used to be not the case right?

[gijzelaerr]

fixed this, just copying the cursor before usage in keehive.

[gijzelaerr]

I think this behavior changed since the removal of the const a while ago.