defrag: update exception policy counter: ptr can't be NULL

src/defrag-hash.c

@@ -455,7 +455,7 @@ static void DefragExceptionPolicyStatsIncr(
         ThreadVars *tv, DecodeThreadVars *dtv, enum ExceptionPolicy policy)
 {
     uint16_t id = dtv->counter_defrag_memcap_eps.eps_id[policy];
-    if (likely(tv && id > 0)) {
+    if (likely(id > 0)) {
         StatsIncr(tv, id);
     }
 }