tests: fix memory leak in test-bus-marshal

Fixes:
```
$ ./configure ... --enable-dbus
$ make
$ make valgrind-tests TESTS=test-bus-marshal
...
==25301== 51 bytes in 1 blocks are definitely lost in loss record 7 of 18
==25301==    at 0x4C2DD9F: realloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==25301==    by 0x5496B8C: ??? (in /lib/x86_64-linux-gnu/libdbus-1.so.3.14.3)
==25301==    by 0x54973E3: _dbus_string_append_printf_valist (in /lib/x86_64-linux-gnu/libdbus-1.so.3.14.3)
==25301==    by 0x547E5C2: _dbus_set_error_valist (in /lib/x86_64-linux-gnu/libdbus-1.so.3.14.3)
==25301==    by 0x547E73E: dbus_set_error (in /lib/x86_64-linux-gnu/libdbus-1.so.3.14.3)
==25301==    by 0x548969A: dbus_message_demarshal (in /lib/x86_64-linux-gnu/libdbus-1.so.3.14.3)
==25301==    by 0x115C1A: main (test-bus-marshal.c:244)
==25301==
```

diff --git a/src/libsystemd/sd-bus/test-bus-marshal.c b/src/libsystemd/sd-bus/test-bus-marshal.c
index 077cc6d..b9d1ea5 100644 (file)
--- a/src/libsystemd/sd-bus/test-bus-marshal.c
+++ b/src/libsystemd/sd-bus/test-bus-marshal.c
@@ -246,6 +246,8 @@ int main(int argc, char *argv[]) {
                         log_error("%s", error.message);
                 else
                         dbus_message_unref(w);
+
+                dbus_error_free(&error);
         }
 #endif