launch: silence compiler warning
launch: silence compiler warning

../dbus-broker-scm/src/launch/main.c: In function 'manager_load':
../dbus-broker-scm/subprojects/c-sundry/src/c-macro.h:607:17: warning: 'dir' may be used uninitialized in this function [-Wmaybe-uninitialized]
                 closedir(d);
                 ^~~~~~~~~~~
../dbus-broker-scm/src/launch/main.c:652:39: note: 'dir' was declared here
         _c_cleanup_(c_closedirp) DIR *dir;
                                       ^~~

Signed-off-by: Marc-Antoine Perennou <07f76cf0511c79b361712839686f3cee8c75791c@Perennou.com>

bus1/dbus-broker