fix debugging (overlooked earlier)

src/vdp_pesi.c

@@ -600,7 +600,7 @@ node_insert(struct bytes_tree *tree, struct node *parent,
 		Lck_Unlock(&tree->tree_lock);
 	}
 
-	VSLdbgv(tree->root->req, "node_insert: node=%p parent=%p "
+	VSLdbgv(tree->root->nexus.req, "node_insert: node=%p parent=%p "
 	    "parent->state=%d parent->npending_private=%d "
 	    "npending=%d",
 	    node, parent,
@@ -1402,7 +1402,7 @@ bytes_unpend_worklist(struct req *req, struct bytes_tree *tree,
 			}
 
 			AZ(node);
-			VSLdbgv(req, "bytes_unpend: reached root");
+			VSLdbg(req, "bytes_unpend: reached root");
 			set_front(tree, tree->root, req->wrk);
 			return;
 		}