pcp-dstat: fix cursor offsetting in unusual terminal states
pcp-dstat: fix cursor offsetting in unusual terminal states

Resolves Red Hat BZ #1640913

adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp