[2093] minor cleanup

src/lib/datasrc/rbtree.h

@@ -537,7 +537,7 @@ RBNode<T>::getAbsoluteLabelSequence(
         upper = upper->getUpperNode();
     }
 
-    return (isc::dns::LabelSequence(result));
+    return (result);
 }
 
 template <typename T>

src/lib/datasrc/tests/rbtree_unittest.cc

@@ -1010,7 +1010,7 @@ TEST_F(RBTreeTest, getAbsoluteLabels) {
         EXPECT_FALSE(ls.isAbsolute());
 
         // Now check the absolute names
-        LabelSequence abs_ls = crbtnode->getAbsoluteLabelSequence(buf);
+        LabelSequence abs_ls(crbtnode->getAbsoluteLabelSequence(buf));
         EXPECT_EQ(Name(domain_names[i]).toText(), abs_ls.toText());
         EXPECT_TRUE(abs_ls.isAbsolute());
     }