detect/http2.header_name: fix multi buffer setup

src/detect-http2.c

@@ -688,13 +688,16 @@ static InspectionBuffer *GetHttp2HNameData(DetectEngineThreadCtx *det_ctx, const
     uint32_t b_len = 0;
     const uint8_t *b = NULL;
 
-    if (rs_http2_tx_get_header_name(cbdata->txv, flags, cbdata->local_id, &b, &b_len) != 1)
+    if (rs_http2_tx_get_header_name(cbdata->txv, flags, cbdata->local_id, &b, &b_len) != 1) {
+        InspectionBufferSetupMultiEmpty(buffer);
         return NULL;
-    if (b == NULL || b_len == 0)
+    }
+    if (b == NULL || b_len == 0) {
+        InspectionBufferSetupMultiEmpty(buffer);
         return NULL;
+    }
 
-    InspectionBufferSetup(det_ctx, list_id, buffer, b, b_len);
-    InspectionBufferApplyTransforms(buffer, transforms);
+    InspectionBufferSetupMulti(buffer, transforms, b, b_len);
 
     SCReturnPtr(buffer, "InspectionBuffer");
 }