Fix memory leak in SaveYourselfPhase2CB

Valgrind results before:

  definitely lost: 981 bytes in 37 blocks
  indirectly lost: 872 bytes in 6 blocks
    possibly lost: 0 bytes in 0 blocks
  still reachable: 991,316 bytes in 1,795 blocks
       suppressed: 0 bytes in 0 blocks

Valgrind results after:

  definitely lost: 800 bytes in 23 blocks
  indirectly lost: 872 bytes in 6 blocks
    possibly lost: 0 bytes in 0 blocks
  still reachable: 991,316 bytes in 1,795 blocks
       suppressed: 0 bytes in 0 blocks

Signed-off-by: Tim Wiederhake <twied@gmx.net>
Part-of: <https://gitlab.freedesktop.org/xorg/app/twm/-/merge_requests/29>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/twm.c b/src/twm.c
index 4be177c..1221bf8 100644
--- a/src/twm.c
+++ b/src/twm.c
@@ -905,6 +905,8 @@ Done(XtPointer client_data _X_UNUSED, XtSignalId *si2 _X_UNUSED)
         Reborder(CurrentTime);
         XCloseDisplay(dpy);
     }
+
+    DestroySession();
     exit(EXIT_SUCCESS);
 }