When clearing the memory of 'key' in function openssh_read(), only the size of the pointer to the data instead of the whole size of struct openssh_key is cleared. Correct the size calculation as detected by Coverity CID 1191543.

#!/bin/bash
if cvs log $1 >/dev/null 2>/dev/null; then exit 0; else echo "$1 shouldn't be here" ; exit 1; fi