sd-bus: make sure we properly handle NULL callback functions

diff --git a/src/libsystemd/sd-bus/bus-match.c b/src/libsystemd/sd-bus/bus-match.c
index 3391b1a1b6e47671488aecff34fc8db57e3fe94f..9e0769caa63dc08e6fa36f5f3f2ecc1802c2b477 100644 (file)
--- a/src/libsystemd/sd-bus/bus-match.c
+++ b/src/libsystemd/sd-bus/bus-match.c
@@ -289,7 +289,7 @@ int bus_match_run(
                         return r;
 
                 /* Run the callback. And then invoke siblings. */
-                if (node->leaf.callback) {
+                if (node->leaf.callback->callback) {
                         _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL;
                         sd_bus_slot *slot;