Don't use Persistent handles for error strings.
Don't use Persistent handles for error strings.

chrisdew/node-buffertools,bnoordhuis/node-buffertools,bnoordhuis/node-buffertools,chrisdew/node-buffertools,chrisdew/node-buffertools,chrisdew/node-buffertools,bnoordhuis/node-buffertools,bnoordhuis/node-buffertools