refs #5671 another leak

git-svn-id: file:///svn/toku/tokudb@50128 c7de825b-a66e-492c-adef-691d508d4ae1

ft/ft-flusher.cc

@@ -1152,7 +1152,7 @@ merge_leaf_nodes(FTNODE a, FTNODE b)
         LEAFENTRY CAST_FROM_VOIDP(le, lev);
         uint32_t keylen;
         void *key = le_key_and_len(le, &keylen);
-        toku_fill_dbt(&a->childkeys[a->n_children-1], toku_xmemdup(key, keylen), keylen);
+        toku_memdup_dbt(&a->childkeys[a->n_children-1], key, keylen);
         a->totalchildkeylens += keylen;
     }