regression 6020: fix a session not closed

Resource leak in core can be observed when this test case is repeated
many times.

Signed-off-by: Oliver Chiang <sticfeynman@gmail.com>
Reviewed-by: Joakim Bech <joakim.bech@linaro.org>
[jf: fix Author to use first S-o-b; minor commit text reformatting]
Signed-off-by: Jerome Forissier <jerome@forissier.org>
diff --git a/host/xtest/regression_6000.c b/host/xtest/regression_6000.c
index e49af86..290ec71 100644
--- a/host/xtest/regression_6000.c
+++ b/host/xtest/regression_6000.c
@@ -2220,7 +2220,7 @@
 				storage_id);
 
 	ADBG_EXPECT_TEEC_RESULT(c, TEE_ERROR_TARGET_DEAD, res);
-
+	TEEC_CloseSession(&sess);
 	return;
 exit1:
 	ADBG_EXPECT_TEEC_SUCCESS(c, fs_unlink(&sess, obj));