gearman_connection_clone returns empty connections every type

[Clint Byrum]

Whenever the function gearman_connection_clone() is used, an empty new connection is returned instead of a cloned version of the 'from' parameter.

This code in libgearman/connection.c seems to be the culprit:

  if (from || connection == NULL)
    return connection;

I believe the intended line should be

  if (!from || connection == NULL)
    return connection;

To indicate that we should return a new connection if a null was passed in.

[Clint Byrum (clint-fewbar)]

Oops, I failed to mention, this manifests itself in the MySQL UDF's not working properly with libgearman 0.12