Bugfix: _readline returns wrong value if the kbuffer is empty
Bugfix: _readline returns wrong value if the kbuffer is empty

git-svn-id: 982d26d634cff20a18fc4ffad3b37e2f8f994aac@8 285c826d-31ef-41a9-a5b6-d2a4949dcdf2

GNS3/vpcs,GNS3/vpcs