fix a memory leak in the destroy function. addresses #1467

git-svn-id: file:///svn/toku/tokudb@9370 c7de825b-a66e-492c-adef-691d508d4ae1

newbrt/block_table.c

@@ -376,6 +376,7 @@ toku_blocktable_destroy(BLOCK_TABLE *btp) {
     toku_free(bt->block_translation);
     bt->block_translation = NULL;
     destroy_block_allocator(&bt->block_allocator);
+    toku_free(bt);
     unlock_for_blocktable();
 }