We should be consistent with the error codes equals to zero

Author: Nyholm

src/Guzzle6HttpAdapter.php

@@ -50,7 +50,7 @@ public function sendRequest(RequestInterface $request)
             throw $this->handleRequestException($e);
         } catch (Guzzle\TransferException $e) {
             //TODO make sure TransferException is not abstract
-            throw new TransferException($e->getMessage(), $e->getCode(), $e);
+            throw new TransferException($e->getMessage(), 0, $e);
         } catch (Guzzle\SeekException $e) {
             throw new RequestException($e->getMessage(), $request, $e);
         }