ladishd: fix occasional crash on app stop (#141)

vgraph clients that are created by a2j port appear and are later
reused for native jack ports are now interlinked with the jack
client when the first jack port appears.

daemon/virtualizer.c

@@ -773,6 +773,12 @@ port_appeared(
           goto free_alsa_names;
         }
       }
+      else
+      {
+        /* vclient exists but is not interlinked with vclient */
+        /* this can happen when client is created because of a2j port appear */
+        ladish_client_interlink(vclient, jack_client);
+      }
     }
   }