Fix download code.

We need not check request::continuation() for stream resource.

KeyringIO.cpp

@@ -309,8 +309,6 @@ void ExportKeyStreamResource::handleRequest(const Http::Request& request,
         return;
     }
     string buffer;
-    if (!request.continuation()) // Needed for WStreamResource ?
-    {
     Error e;
     GpgMEWorker gpgw;
     e = gpgw.ExportPublicKey(m_fpr.toUTF8().c_str(), buffer);
@@ -321,7 +319,6 @@ void ExportKeyStreamResource::handleRequest(const Http::Request& request,
         return;
     }
     suggestFileName(m_fpr + WString(".asc"), ContentDisposition::Attachment);
-    }
 
     istrstream bufStream(buffer.c_str());
     handleRequestPiecewise(request, response, bufStream);