selinux: fix uninitalised stack variable read in sel_netport_init

[Dave Jones <davej@redhat.com>]

After the removal of the avc_add_callback() in commit 615e51fdda6
("selinux: reduce the number of calls to synchronize_net() when flushing caches"),
ret is never set to anything, but we return uninitialized stack data on success.

Given the absense of other failure paths, just explicitly return 0.

Signed-off-by: Dave Jones <davej@redhat.com>

diff --git a/security/selinux/netport.c b/security/selinux/netport.c
index 73ac6784d091..3311cc393cb4 100644
--- a/security/selinux/netport.c
+++ b/security/selinux/netport.c
@@ -237,7 +237,6 @@ void sel_netport_flush(void)
 static __init int sel_netport_init(void)
 {
 	int iter;
-	int ret;
 
 	if (!selinux_enabled)
 		return 0;
@@ -247,7 +246,7 @@ static __init int sel_netport_init(void)
 		sel_netport_hash[iter].size = 0;
 	}
 
-	return ret;
+	return 0;
 }
 
 __initcall(sel_netport_init);