apparmor: Fix uninitialized symbol 'array_size' in policy_unpack_test.c

Make sure array_size is initialized in the kunit test to get rid of
compiler warnings. This will also make sure the following tests fail
consistently if the first test fails.
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>

security/apparmor/policy_unpack_test.c

@@ -140,7 +140,7 @@ static void policy_unpack_test_inbounds_when_out_of_bounds(struct kunit *test)
 static void policy_unpack_test_unpack_array_with_null_name(struct kunit *test)
 {
 	struct policy_unpack_fixture *puf = test->priv;
-	u16 array_size;
+	u16 array_size = 0;
 
 	puf->e->pos += TEST_ARRAY_BUF_OFFSET;
 
@@ -155,7 +155,7 @@ static void policy_unpack_test_unpack_array_with_name(struct kunit *test)
 {
 	struct policy_unpack_fixture *puf = test->priv;
 	const char name[] = TEST_ARRAY_NAME;
-	u16 array_size;
+	u16 array_size = 0;
 
 	puf->e->pos += TEST_NAMED_ARRAY_BUF_OFFSET;