[t:2440] Fix memory leak

git-svn-id: file:///svn/toku/tokudb@19487 c7de825b-a66e-492c-adef-691d508d4ae1

newbrt/txn.c

@@ -154,6 +154,7 @@ local_checkpoints_and_log_xcommit(void *thunk) {
 
         int r = toku_cachetable_local_checkpoint_for_commit(ct, txn, num_cachefiles, cachefiles);
         assert(r==0);
+        toku_free(cachefiles);
         toku_poll_txn_progress_function(txn, TRUE, FALSE);
     }