Checker name is not displayed on failure
Checker name is not displayed on failure

If add_checker() isn't able to locate the checker
it won't display the name in free_checker().

Signed-off-by: Hannes Reinecke <b0d1e9e4a4e27620745ff49be9000da3174a4cc6@suse.de>

unakatsuo/multipath-tools,unakatsuo/multipath-tools,vijaychauhan/multipath-tools,unakatsuo/multipath-tools,vijaychauhan/multipath-tools