ip: fix coverity warning

Remove unnecessary NULL check of t0, which causes coverity to scream. t0
is always initilised to *something* by doing pool_elt_at_index().

Type: fix
Signed-off-by: Klement Sekera <ksekera@cisco.com>
Change-Id: I7cf21767c43a24923e490ad40622743c17142fe2
diff --git a/src/vnet/ip/ip_in_out_acl.c b/src/vnet/ip/ip_in_out_acl.c
index e858c8e..2ed571a 100644
--- a/src/vnet/ip/ip_in_out_acl.c
+++ b/src/vnet/ip/ip_in_out_acl.c
@@ -663,7 +663,7 @@
 	  t->sw_if_index =
 	    ~0 == way ? 0 : vnet_buffer (b[0])->sw_if_index[way];
 	  t->next_index = next0;
-	  t->table_index = t0 ? t0 - tables : ~0;
+	  t->table_index = t0 - tables;
 	  t->offset = (e0 && t0) ? vnet_classify_get_offset (t0, e0) : ~0;
 	}