patch 9.0.1840: [security] use-after-free in do_ecmd

Problem:  use-after-free in do_ecmd
Solution: Verify oldwin pointer after reset_VIsual()

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/testdir/Make_all.mak b/src/testdir/Make_all.mak
index e2e29f1..961718f 100644
--- a/src/testdir/Make_all.mak
+++ b/src/testdir/Make_all.mak
@@ -105,6 +105,7 @@
 	test_conceal \
 	test_const \
 	test_cpoptions \
+	test_crash \
 	test_crypt \
 	test_cscope \
 	test_cursor_func \
@@ -369,6 +370,7 @@
 	test_conceal.res \
 	test_const.res \
 	test_cpoptions.res \
+	test_crash.res \
 	test_crypt.res \
 	test_cscope.res \
 	test_cursor_func.res \