Search on different namespace got fatal error

Fatal error: Call to a member function get_url_queryvalues() on a non-object

Because line 177 apachesolr_current_query() use default namespace, so on a different namespace, it returns null, and cause line 178 a fatal error. Extra if before line 178 will fix this.

This issue also imply that, this module only log default namespace by apachesolr search module. And in 6.x, there is not a method to return the current namespace.