pki: Reset variable so error handling works properly

If we jump to `end` without this we crash (not necessarily visibly) due
to a double free and the actual error message is not printed.

diff --git a/src/pki/commands/issue.c b/src/pki/commands/issue.c
index b0399c78b7e9174bbec345f469d3243c0e77d32c..e41c56d081349004512cbf8aefc49352f5cd1685 100644 (file)
--- a/src/pki/commands/issue.c
+++ b/src/pki/commands/issue.c
@@ -406,6 +406,7 @@ static int issue()
                goto end;
        }
        public->destroy(public);
+       public = NULL;
 
        if (hex)
        {