detect/parse: minor validation code cleanups

src/detect-parse.c

@@ -1686,7 +1686,6 @@ SigMatchData* SigMatchList2DataArray(SigMatch *head)
 static int SigValidate(DetectEngineCtx *de_ctx, Signature *s)
 {
     uint32_t sig_flags = 0;
-    SigMatch *sm;
     const int nlists = s->init_data->smlists_array_size;
 
     SCEnter();
@@ -1842,24 +1841,22 @@ static int SigValidate(DetectEngineCtx *de_ctx, Signature *s)
         if (s->init_data->smlists[DETECT_SM_LIST_PMATCH]) {
             if (!(s->flags & (SIG_FLAG_REQUIRE_PACKET | SIG_FLAG_REQUIRE_STREAM))) {
                 s->flags |= SIG_FLAG_REQUIRE_STREAM;
-                sm = s->init_data->smlists[DETECT_SM_LIST_PMATCH];
-                while (sm != NULL) {
+                for (SigMatch *sm = s->init_data->smlists[DETECT_SM_LIST_PMATCH]; sm != NULL;
+                        sm = sm->next) {
                     if (sm->type == DETECT_CONTENT &&
                             (((DetectContentData *)(sm->ctx))->flags &
                              (DETECT_CONTENT_DEPTH | DETECT_CONTENT_OFFSET))) {
                         s->flags |= SIG_FLAG_REQUIRE_PACKET;
                         break;
                     }
-                    sm = sm->next;
                 }
                 /* if stream_size is in use, also inspect packets */
-                sm = s->init_data->smlists[DETECT_SM_LIST_MATCH];
-                while (sm != NULL) {
+                for (SigMatch *sm = s->init_data->smlists[DETECT_SM_LIST_MATCH]; sm != NULL;
+                        sm = sm->next) {
                     if (sm->type == DETECT_STREAM_SIZE) {
                         s->flags |= SIG_FLAG_REQUIRE_PACKET;
                         break;
                     }
-                    sm = sm->next;
                 }
             }
         }
@@ -1893,10 +1890,9 @@ static int SigValidate(DetectEngineCtx *de_ctx, Signature *s)
 #endif
 
 #ifdef DEBUG
-    int i;
-    for (i = 0; i < nlists; i++) {
+    for (int i = 0; i < nlists; i++) {
         if (s->init_data->smlists[i] != NULL) {
-            for (sm = s->init_data->smlists[i]; sm != NULL; sm = sm->next) {
+            for (SigMatch *sm = s->init_data->smlists[i]; sm != NULL; sm = sm->next) {
                 BUG_ON(sm == sm->prev);
                 BUG_ON(sm == sm->next);
             }