[Fluxus] editor lines now works for me :D.

[Glauber Alex Dias Prado]

Hi Dave, 

i commited a tiny fix for the editor but which did the job for me, hope
its ok as it is a one liner:

http://cvs.savannah.nongnu.org/viewvc/fluxus/src/GLEditor.cpp?root=fluxus&r1=1.36&r2=1.37

Cheers,

Glauber.