detect/http.uri: update buffer initialization logic

src/detect-http-uri.c

@@ -224,7 +224,7 @@ static InspectionBuffer *GetData(DetectEngineThreadCtx *det_ctx,
     SCEnter();
 
     InspectionBuffer *buffer = InspectionBufferGet(det_ctx, list_id);
-    if (buffer->inspect == NULL) {
+    if (!buffer->initialized) {
         htp_tx_t *tx = (htp_tx_t *)txv;
         HtpTxUserData *tx_ud = htp_tx_get_user_data(tx);
 
@@ -250,7 +250,7 @@ static InspectionBuffer *GetData2(DetectEngineThreadCtx *det_ctx,
     SCEnter();
 
     InspectionBuffer *buffer = InspectionBufferGet(det_ctx, list_id);
-    if (buffer->inspect == NULL) {
+    if (!buffer->initialized) {
         uint32_t b_len = 0;
         const uint8_t *b = NULL;
 
@@ -319,7 +319,7 @@ static InspectionBuffer *GetRawData(DetectEngineThreadCtx *det_ctx,
     SCEnter();
 
     InspectionBuffer *buffer = InspectionBufferGet(det_ctx, list_id);
-    if (buffer->inspect == NULL) {
+    if (!buffer->initialized) {
         htp_tx_t *tx = (htp_tx_t *)txv;
         if (unlikely(tx->request_uri == NULL)) {
             return NULL;