couchbase_res->rc not set on view execute failure

In views.c in php_couchbase_view_impl(), the couchbase_res->rc result code is last set in case the lcb_timer can't be created. But it is not set in case of any further failures in actually processing the view results.

I expect it to clear the flag (set it to LCB_SUCCESS) on success, and set it to some meaningful error code in the failure branches:

https://github.com/couchbase/php-ext-couchbase/blob/cf70968ed3f0c781e75e4cc43de6c561019b459d/views.c#L357

https://github.com/couchbase/php-ext-couchbase/blob/cf70968ed3f0c781e75e4cc43de6c561019b459d/views.c#L369