Have ' ' chars get inserted correctly after a resize
Have ' ' chars get inserted correctly after a resize

Since the character spec didn't contain a character width it was being skipped
during refresh.

Fixes #159

sourcelair/xterm.js,cjordog/NRLWebsite,cjordog/NRLWebsite,akalipetis/xterm.js,akalipetis/xterm.js,akalipetis/xterm.js,cjordog/NRLWebsite,akalipetis/xterm.js,xtermjs/xterm.js,cjordog/NRLWebsite,Tyriar/xterm.js,Tyriar/xterm.js,xtermjs/xterm.js,sourcelair/xterm.js,sourcelair/xterm.js,xtermjs/xterm.js,Tyriar/xterm.js,Tyriar/xterm.js,Tyriar/xterm.js,sourcelair/xterm.js,xtermjs/xterm.js,xtermjs/xterm.js