fix a nasty error with fallback unencrypted peer connections.

libtransmission/handshake.c

@@ -971,6 +971,7 @@ gotError( struct bufferevent * evbuf UNUSED, short what, void * arg )
         dbgmsg( handshake, "handshake failed, trying plaintext..." );
         int msgSize; 
         uint8_t * msg = buildHandshakeMessage( handshake, &msgSize );
+        handshake->haveSentBitTorrentHandshake = 1;
         setReadState( handshake, AWAITING_HANDSHAKE );
         tr_peerIoWrite( handshake->io, msg, msgSize );
         tr_free( msg );