Merge pull request #89 from kahkeng/transfer_reset_pos

Reset stream buffer position before retrying part transfer

Author: JonathanHenson

aws-cpp-sdk-transfer/source/transfer/UploadFileRequest.cpp

@@ -709,6 +709,7 @@ void UploadFileRequest::HandlePartFailure(const Aws::S3::Model::UploadPartOutcom
 void UploadFileRequest::DoRetry(PartRequestRecord& partRequest)
 {
     ++m_totalPartRetries;
+    partRequest.m_partRequest.GetBody()->seekg(0);
     RequestPart(partRequest.m_partRequest.GetPartNumber());
 }