Fixed windows build error

src/event/ngx_event_udp.c

@@ -581,14 +581,6 @@ ngx_lookup_udp_connection(ngx_listening_t *ls, struct sockaddr *sockaddr,
         }
     }
 
-#else
-
-void
-ngx_delete_udp_connection(void *data)
-{
-    return;
-}
-
 #endif
 
     node = ls->rbtree.root;
@@ -829,6 +821,13 @@ void ngx_event_recvmsg(ngx_event_t *ev)
 }
 
 
+void
+ngx_delete_udp_connection(void *data)
+{
+    return;
+}
+
+
 #endif
 
 static void