Resizable: whitespace fixed

commit bae1a25b1437988686233545143fdf2c16ae8058 was causing dialog to fail and giving JS errors in console

with this commit . this problem is fixed.


More details is on this comment thread 
https://github.com/jquery/jquery-ui/commit/20f064662a016eaa6bc580aed012022c63f675aa#commitcomment-4997995