Smack: fix: invalid length set for the result of /smack/access

Forgot to update simple_transaction_set() to take terminator
character into account.

Signed-off-by: Jarkko Sakkinen <jarkko.j.sakkinen@gmail.com>
Signed-off-by: Casey Schaufler <cschaufler@cschaufler-intel.(none)>
diff --git a/security/smack/smackfs.c b/security/smack/smackfs.c
index 5498c4a..381eecf 100644
--- a/security/smack/smackfs.c
+++ b/security/smack/smackfs.c
@@ -1514,7 +1514,7 @@
 	data[0] = res == 0 ? '1' : '0';
 	data[1] = '\0';
 
-	simple_transaction_set(file, 1);
+	simple_transaction_set(file, 2);
 	return SMK_LOADLEN;
 }