efl/ethumb: Fix memory leak on error path in ethumb_slave.
When we hit an error with _ec_pipe_str_read we should clean up the strdup from previous calls to avoid leaks in the error case.
efl/ethumb: Fix memory leak on error path in ethumb_slave.
When we hit an error with _ec_pipe_str_read we should clean up the strdup from previous calls to avoid leaks in the error case.