daemon: fix fd leak in do_inotify_files on error paths (#319)

When popen or do_inotify_read fails, the file descriptor created by
mkstemp is never closed before returning. Add close(fd) to both
error paths to prevent file descriptor leaks.

Co-authored-by: Claude <noreply@anthropic.com>

daemon/inotify.c

@@ -331,6 +331,7 @@ do_inotify_files (void)
   pp = popen (cmd, "w");
   if (pp == NULL) {
     reply_with_perror ("sort");
+    close (fd);
     unlink (tempfile);
     return NULL;
   }
@@ -339,6 +340,7 @@ do_inotify_files (void)
     events = do_inotify_read ();
     if (events == NULL) {
       pclose (pp);
+      close (fd);
       unlink (tempfile);
       return NULL;
     }