[dev] change in ngx_conf_merge_ptr_value for 0.5.33

[Manlio Perillo]

Igor, do you have made some changes in the ngx_conf_merge_ptr_value 
function?

In mod_wsgi I have:
ngx_conf_merge_ptr_value(conf->callable_object, prev->callable_object,
                          "application");

for directive wsgi_application_callable.

With 0.5.32 and 0.6.16, when the directive is not supplied, its value is 
"application".

With 0.5.33 it is NULL.

conf->callable_object is a char *.



Thanks  Manlio Perillo