terminal: minor fix for clear screen.
terminal: minor fix for clear screen.

rosshinkley/blessed,rstr74/blessed,dbkaplun/blessed,anko/blessed,rstr74/blessed,zBMNForks/blessed,chjj/blessed,mcanthony/blessed,chjj/blessed,eush77/blessed,umi/blessed,dbkaplun/blessed,umi/blessed,mcanthony/blessed,zBMNForks/blessed,anko/blessed,piranna/blessed,eush77/blessed,rosshinkley/blessed,piranna/blessed