NetKVM: BZ#1169718: Checking the length only on read

Signed-off-by: Joseph Hindin <yhindin@rehat.com>
CNB *CNBL::PopMappedNB()
{
    m_MappedBuffersDetached++;
    return m_MappedBuffers.Pop();
}

CNB *CNBL::PopMappedNB()
{
    m_MappedBuffersDetached++;
    return m_MappedBuffers.Pop();
}
