[t:2300], fix memory leak

git-svn-id: file:///svn/mysql/tokudb-engine/src@16952 c7de825b-a66e-492c-adef-691d508d4ae1

storage/tokudb/ha_tokudb.cc

@@ -5415,6 +5415,7 @@ cleanup:
         int r = status_block->close(status_block, 0);
         assert(r==0);
     }
+    free_key_and_col_info(&kc_info);
     if (txn) {
         if (error) {
             abort_txn(txn);