Make sure HttpProtocol doesn't print content twice in case of error

If write() was called with last = true and then error was
called you would end up with the data written twice

1 files changed, 1 insertions, 0 deletions

diff --git a/src/http_protocol.cc b/src/http_protocol.cc
index 6d73502..ad81050 100644
--- a/src/http_protocol.cc
+++ b/src/http_protocol.cc
@@ -304,6 +304,7 @@ public:
     if (last) {
       HexDump::write(text_, HexDump::ADDRESS | HexDump::CHARS, buffer_.data(),
                      0, buffer_.size());
+      buffer_.clear();
     }
   }