middleware chain is broken when found ctx.output

I'm not sure about this - I need your eyes here.
If I'm on target - I'll add tests so you can merge.

I'm using restify, and I have other mw on the chain after the swagger_router.
(e.g `server.on('after', restify.auditLogger(options.auditLogCfg));` )

I first noted that when I dont use json_error_handler - I get the audit entry on requests that error, and when I do - I dont.
(e.g. - the 'after' event is not emitted)

The research led me to the corrected lines.

lib/connect_middleware.js

@@ -89,9 +89,9 @@ function Middleware(runner) {
 
               debugContent('sending response body: %s', body);
               response.end(body);
-            } else {
-              next();
-            }
+            } 
+
+            next();
           }
           catch (err) {
             /* istanbul ignore next */