build fix

Author: DmitriyMusatkin

source/s3_request.c

@@ -38,7 +38,7 @@ struct aws_s3_request *aws_s3_request_new(
     request->part_number = part_number;
     request->record_response_headers = (flags & AWS_S3_REQUEST_FLAG_RECORD_RESPONSE_HEADERS) != 0;
     request->should_allocate_buffer_from_pool = (flags & AWS_S3_REQUEST_FLAG_ALLOCATE_BUFFER_FROM_POOL) != 0;
-    request->has_buffer_ticket_for_response = (flags & AWS_S3_REQUEST_FLAG_RESPONSE_ALLOCATED_FROM_POOL;)
+    request->has_buffer_ticket_for_response = (flags & AWS_S3_REQUEST_FLAG_RESPONSE_ALLOCATED_FROM_POOL) != 0;
     request->always_send = (flags & AWS_S3_REQUEST_FLAG_ALWAYS_SEND) != 0;
 
     return request;