detect/pmq: assist branch prediction

src/util-prefilter.h

@@ -61,9 +61,7 @@ int PrefilterAddSidsResize(PrefilterRuleStore *pmq, uint32_t new_size);
 static inline void PrefilterAddSids(
         PrefilterRuleStore *pmq, const SigIntId *sids, uint32_t sids_size)
 {
-    if (sids_size == 0)
-        return;
-
+    if (sids_size > 0) {
         uint32_t new_size = pmq->rule_id_array_cnt + sids_size;
         if (new_size > pmq->rule_id_array_size) {
             if (PrefilterAddSidsResize(pmq, new_size) == 0) {
@@ -80,6 +78,7 @@ static inline void PrefilterAddSids(
             *ptr++ = *sids++;
         } while (ptr != end);
         pmq->rule_id_array_cnt += sids_size;
+    }
 }
 
 int PmqSetup(PrefilterRuleStore *);