basic: endless loop on connection close in tcp_stream #36

In Decoder.tcp_stream() (branch basic):

int len = (input.read() << 8) | input.read();
...
while (read < len) {
    read += input.read(data, read, len - read);
}

InputStream.read() returns -1 at end of stream, and the result is never checked.

• When the camera closes the connection while a packet is being read, read keeps decreasing by 1. The inner loop never ends and never checks activeStream, so the network thread hangs at 100% CPU and the app never reconnects.
• At EOF the header read gives len = -1, so new byte[-1] throws NegativeArraySizeException.

Fix: check every read for -1 and throw IOException, so the outer loop reconnects.