gnu: xscreensaver: Update to 5.40.

* gnu/packages/xdisorg.scm (xscreensaver): Update to 5.40.

gnu/packages/xdisorg.scm

@@ -987,7 +987,7 @@ color temperature should be set to match the lamps in your room.")
 (define-public xscreensaver
   (package
     (name "xscreensaver")
-    (version "5.39")
+    (version "5.40")
     (source
      (origin
        (method url-fetch)
@@ -996,7 +996,7 @@ color temperature should be set to match the lamps in your room.")
                        version ".tar.gz"))
        (sha256
         (base32
-         "09i47h4hdgwxyqgrsnshl4l5dv5mrsp37h705cc22lwby601ikj8"))))
+         "1q2sr7h6ps6d3hk8895g12rrcqiihjl7py1ly077ikv4866r181h"))))
     (build-system gnu-build-system)
     (arguments
      `(#:tests? #f  ; no check target