db/update/InotifyUpdate: fix use-after-free bug

NEWS

@@ -2,6 +2,8 @@ ver 0.23.3 (not yet released)
 * protocol
   - add optional position parameter to "add" and "playlistadd"
   - allow range in "playlistdelete"
+* database
+  - inotify: fix use-after-free bug
 * output
   - alsa: add option "stop_dsd_silence" to work around DSD DAC noise
 * macOS: fix libfmt related build failure

src/db/update/InotifyUpdate.cxx

@@ -282,7 +282,7 @@ InotifyUpdate::InotifyCallback(int wd, unsigned mask,
 	    (mask & IN_ISDIR) != 0) {
 		/* a sub directory was changed: register those in
 		   inotify */
-		const Path root_path = root->name;
+		const auto root_path = root->name;
 
 		const auto path_fs = uri_fs.IsNull()
 			? root_path