apparmor: Redundant condition: prev_ns. in [label.c:1498]

Reported-by: David Binderman <dcb314@hotmail.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
diff --git a/security/apparmor/label.c b/security/apparmor/label.c
index e052eab..e324f4d 100644
--- a/security/apparmor/label.c
+++ b/security/apparmor/label.c
@@ -1495,7 +1495,7 @@
 		view = profiles_ns(profile);
 
 	if (view != profile->ns &&
-	    (!prev_ns || (prev_ns && *prev_ns != profile->ns))) {
+	    (!prev_ns || (*prev_ns != profile->ns))) {
 		if (prev_ns)
 			*prev_ns = profile->ns;
 		ns_name = aa_ns_name(view, profile->ns,